Hi!
This forum has switched to Incus, which is a continuation of LXD.
The switch happened about a year ago.
There are several options. For your case, you might find X2Go as a good option. Prior discussion, How to run a containerized Desktop Environment in a Window? - #14 by simos
I suppose you will be using some baremetal server from a hosting provider with the Ampere hardware. You can test these out first, by getting a VPS that is based on the Ampere architecture. Hetzner has an inexpensive VPS that is based on the Ampere Altra, https://www.hetzner.com/cloud/