remminia is a client (I believe for rdp and vnc), but to host you’d need some type of server.

The best and fanciest today is sunshine but it requires some kind of gpu for encoding - so probably out of the question for an RPI

The next are all pretty similar, (I myself have most experience with vnc so I can attest to it): xrdp/rdp, vnc, and nx

Half of them try and create their own virtual desktop to stream, but so you probably want to stream a real desktop - x11vnc does a great job at this (and if anything has too many options)