Is there a ready-made chat solution for a website with a mobile application?

Question

Chats

There is a closed product catalog (only for employees) on Laravel 5.
You need to make your own chat on each product. In fact, these are just comments on the product for logged in users.
You also need a mobile application for comments, for example, a user subscribes to a certain chat and he receives notifications on his phone and you can answer there.
Prompt ready-made solution for our needs. Those. you need an embedded chat with flexible settings and a ready-made mobile application.

Answer 1

Your requirements are specific.
Packages like https://github.com/cmgmyr/laravel-messenger make no sense to take as a basis.
Need to be developed from scratch. In fact, these are comments, right?)
About the mobile application in general, ales. What's with Laravel?
If you just read everything that you wrote, it seems that you are writing not for a toaster, but for freelancing

Answer 2

just in case reloadable widget https://github.com/arrilot/laravel-widgets