Add class initialization on bundle load

app/assets/javascripts/protected_branches/ee/index.js

+/* eslint-disable no-unused-vars */
 import './protected_branch_access_dropdown';
 import './protected_branch_create';
 import './protected_branch_dropdown';
 import './protected_branch_edit';
 import './protected_branch_edit_list';
+
+$(() => {
+  const protectedBranchCreate = new gl.ProtectedBranchCreate();
+  const protectedBranchEditList = new gl.ProtectedBranchEditList();
+});