The Chat Provider I want to use is not in the list of available Chat Providers

Issue

I would like to enable Click To Chat in our Liferay instance.
I have checked the documentation: Enabling Automated Live Chat Systems
The Chat Provider I want is not in the supported list: Getting The Chat Provider Account ID or Token
How can I use another provider?

Many Chat Providers offer purely HTML/JS/CSS based solutions which can be layered over DXP. They can be introduced by fragments and embedded on each page by positioning them on a Master Page Template.
If you would like the Chat Provider to be integrated with DXP, you can raise a Feature Request for that specific Provider: Requesting a New Feature or Feature Improvement (see LPS-182708 as an example)
There is another Feature Request ticket opened for having an extension point for Click to Chat, which could make it possible to integrate the selected Provider: LPS-183491

It is a good idea to follow the Feature Request (add yourself as Watcher on the Jira ticket) for receiving any updates.
You can also Vote for the Feature Request to express your need. Requests with higher customer demand have the chance to be implemented sooner.
Please note that it is up to the Product Team to decide what third-party technologies DXP is built to integrate with.
It is out of scope for Liferay Support to assist with any custom solution.
You might consider contacting our Global Services team for assistance with implementing custom solutions.