“Nestri is an open-source, self-hosted Geforce Now alternative with Stadia’s social features.”

“Our goal is to develop a comprehensive self-hosted cloud gaming solution for your home server.”

https://github.com/nestrilabs/nestri

Maybe https://nestri.io/ is similar enough to what you’re looking for?

No idea where they live but here in Germany ads for political parties are severely limited except during the months leading up to an election and advertising aimed a children is harshly regulated.

Sidenote: A similar app is https://squoosh.app/