Finally i got it, after 3 days of work and research..

In front end for example for create a new custom channel


/** @odoo-module **/
// BusListener.js
import { registry } from"@web/core/registry";
constmyService= {    dependencies: ['bus_service'],    start(_, { bus_service }) {        console.log('Add notification')
        bus_service.addChannel('my-event') // New channel
        bus_service.addEventListener('notification', ({ detail: notifications }) => {            console.log({ notifications })            for (const { payload, type } ofnotifications) {                if (type==="my-event") {                    this.myEventHandler(payload)                }            }        });
        bus_service.addEventListener('connect', () => {            console.log('Connected')        });
        bus_service.start();
    },
    myEventHandler(event) {        console.log({ event });    }};
registry.category("services").add("myService", myService);

In backend:


# -*- coding: utf-8 -*-fromodooimportmodels, fields, api
classBusModel(models.Model):    _name='bus_test'    _description="Bus para my modulo"
    name=fields.Char(string="Name")
    @api.model    defmy_method(self):        self.env['bus.bus']._sendone('my-event', 'my-event', {            'server_version': "my-event"        })

setup() {

this.env.bus.on('WEB_CLIENT_READY', null, async () => {

const bus_service = owl.Component.env.services.bus_service;

bus_service.onNotification(this, this._onNotification);

bus_service.addChannel(/* record.user_id.partner_id */);

bus_service.startPolling();

});

}

Sorry for formatting, this web editor is terrible. Grep 15.0 for plenty of examples of what _onNotification looks like.

did you ever find an answer?