Unfortunately no :(, and it's hard there'll be one soon. Facebook is much more closed off than Instagram or Threads. They really beg for you to have an account, and if someone were to start an alternative frontend which uses burner accounts, they would get blocked immediately AND lose in court, since that bleeds into computer fraud and abuse laws, similar to how Barinsta got taken down.
I think you're much better off getting an account with an aliased email address and using a plugin like Facebook Container to access those groups. Add a good proxy/VPN to this, and it'll be virtually impossible to link it back to anything else you do online. That's what I've done, since I use Facebook Marketplace to buy things from time to time, and it has worked well, with me only getting suggestions from Facebook pages I've already visited.