Are rich messages supported?

I’m wanting to create a chat bot and use rich messages to interact with the user, specifically I’d like to give the buttons to click. I’ve found posts going all the way back to 2018 that made me think they were supported but I can’t find anything in the official documentation. If someone could point me in the right direction I would be most grateful.

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I’m also looking for the rich messaging documentation. Could someone please post a link to it?

i also looking for this.