I have used a certain “online-fix me” (not sure if I’m allowed to promote) website that offers patches for games so you can connect to the official multiplayer servers.
Of course there’s a possibility of getting banned if they detect it, but I’ve played a lot of the Forza games online with this throughout the years without issue.
I realise it’s not strictly on topic for community run servers, but it may be of interest to people in this thread.
I’m using Arc browser full time for work and personal use now. Absolutely in love. They’ve just released publicly after a while in closed beta, so no more invite keys needed!