diff --git a/__manifest__.py b/__manifest__.py
index 6c84c2f..3423ade 100644
--- a/__manifest__.py
+++ b/__manifest__.py
@@ -24,6 +24,7 @@ Features
     'assets': {
         'point_of_sale._assets_pos': [
             # Incremental rendering patches (existing)
+            'pos_ui_optimization/static/src/app/services/pos_store_patch.js',
             'pos_ui_optimization/static/src/app/components/order_display/order_display_patch.js',
             'pos_ui_optimization/static/src/app/components/order_display/order_display_patch.xml',
             'pos_ui_optimization/static/src/app/screens/product_screen/product_screen_patch.js',
diff --git a/static/src/app/components/order_display/order_display_patch.js b/static/src/app/components/order_display/order_display_patch.js
index be49fee..321fff1 100644
--- a/static/src/app/components/order_display/order_display_patch.js
+++ b/static/src/app/components/order_display/order_display_patch.js
@@ -4,7 +4,23 @@ import { OrderDisplay } from "@point_of_sale/app/components/order_display/order_
 import { patch } from "@web/core/utils/patch";
 import { useState, useEffect } from "@odoo/owl";
 
+OrderDisplay.props.order = { type: Object, optional: true };
+
 patch(OrderDisplay.prototype, {
+    get order() {
+        return this.props.order || {
+            lines: [],
+            prices: { taxDetails: { has_tax_groups: false } },
+            currencyDisplayPriceExcl: "",
+            currencyAmountTaxes: "",
+            currencyDisplayPriceIncl: "",
+            general_customer_note: "",
+            internal_note: "",
+            config_id: {},
+            currency: { id: null },
+        };
+    },
+
     setup() {
         super.setup();
         // Use Object.assign to avoid overwriting state from other patches (e.g. pos_urban_piper)
diff --git a/static/src/app/services/pos_store_patch.js b/static/src/app/services/pos_store_patch.js
new file mode 100644
index 0000000..fbcca5e
--- /dev/null
+++ b/static/src/app/services/pos_store_patch.js
@@ -0,0 +1,63 @@
+/** @odoo-module **/
+
+import { PosStore } from "@point_of_sale/app/services/pos_store";
+import { patch } from "@web/core/utils/patch";
+
+patch(PosStore.prototype, {
+    get productToDisplayByCateg() {
+        // We override this getter to remove Odoo's hardcoded 100-product category limit.
+        // Because our custom UI optimization module uses progressive rendering (lazy loading)
+        // on scroll, we can safely return the entire category's product list without risking
+        // browser freeze or UI lockups.
+        const sortedProducts = this.productsToDisplay;
+        if (!this.config.iface_group_by_categ) {
+            return sortedProducts.length ? [["0", sortedProducts]] : [];
+        }
+
+        const results = [];
+        const searchWord = this.searchProductWord.trim();
+        const byCateg = this.models["product.template"].toRaw().getAllBy("pos_categ_ids");
+        const selectedCategoryIds = !this.selectedCategory
+            ? this.models["pos.category"].map((c) => c.id)
+            : this.selectedCategory.getAllChildren().map((c) => c.id);
+
+        // Sorting in place the categories according to their sequence in the database
+        selectedCategoryIds.sort((a, b) => {
+            const categA = this.models["pos.category"].get(a);
+            const categB = this.models["pos.category"].get(b);
+
+            // All category with a parent will be at the end
+            if (categA.parent_id && !categB.parent_id) {
+                return 1;
+            } else if (!categA.parent_id && categB.parent_id) {
+                return -1;
+            }
+
+            return categA.sequence - categB.sequence;
+        });
+
+        if (!this.selectedCategory) {
+            // In case of no category selected, we want to display products without category in
+            // a "Without category" category at the end of the list.
+            const productWithoutCategory = sortedProducts.filter((p) => !p.pos_categ_ids.length);
+            byCateg["0"] = productWithoutCategory;
+            selectedCategoryIds.push("0");
+        }
+
+        for (const catId of selectedCategoryIds) {
+            const products = byCateg[catId] || [];
+            const filtered = searchWord
+                ? this.getProductsBySearchWord(searchWord, products)
+                : products;
+
+            if (filtered.length) {
+                const sorted = this.orderProductBySequenceAndFav(filtered);
+                // Return the complete list instead of splicing to 100 items.
+                // Our lazy loading mechanism will handle rendering chunk-by-chunk.
+                results.push([catId, sorted]);
+            }
+        }
+
+        return results;
+    }
+});
diff --git a/static/src/scss/portrait.scss b/static/src/scss/portrait.scss
index cc14fce..fb0d81f 100644
--- a/static/src/scss/portrait.scss
+++ b/static/src/scss/portrait.scss
@@ -99,6 +99,8 @@
                 flex-grow: 1 !important;
                 flex-shrink: 1 !important;
                 min-height: 0 !important;
+                overflow-y: auto !important;
+                -webkit-overflow-scrolling: touch;
             }
         }