and put them back in that order on the next boot

main.js

@@ -6,6 +6,16 @@ module.exports = class RibbonOrderLock extends Plugin {
 
     this.app.workspace.onLayoutReady(() => {
       const ribbon = this.app.workspace.leftRibbon;
+      const order = this.settings.order;
+
+      const sorted = [...ribbon.items].sort(
+        (a, b) => order.indexOf(a.id) - order.indexOf(b.id)
+      );
+
+      ribbon.items.length = 0;
+      ribbon.items.push(...sorted);
+      ribbon.onChange(true);
+
       this.settings.order = ribbon.items.map((item) => item.id);
       this.saveData(this.settings);
     });