bemade-addons/confirm_many2one_create/static/src/js/many2one_field.esm.js

/** @odoo-module **/

import {Many2OneField} from "@web/views/fields/many2one/many2one_field";
import {patch} from "@web/core/utils/patch";

patch(Many2OneField.prototype, {
  get Many2XAutocompleteProps() {
    const props = super.Many2XAutocompleteProps;
    props.quickCreate = this.openConfirmationDialog.bind(this);
    return props;
  },
});