As far as I can tell the Poco X3 Pro has been sucessfully ported for quite some time now. This video https://www.youtube.com/watch?v=Dh7le5pUQfY is from ages ago.

And the files even seem to be in the right repositories https://gitlab.com/ubports/porting/community-ports/android11/xiaomi-poco-x3-pro/xiaomi-vayu/. Yet it is not supported by the installer or listed on the devices page.

Is there still more work that needs to be done? If so what?