Idk maybe use a burner number for it. They are even asking email id also I’ll suggest use email aliasing also.
Other options are XDA forums though some roms aren’t posted on xda, maybe dev lazy or xda is really dying because of telegram.
Go to their telegram channel see which roms gets more public rating. Generally there are two types of audience one is battery friendly roms and other one is performance based some are even balanced so choose as per your liking.
Ps: remember unofficial doesn’t mean it’s bad or not safe. If the dev is good the. Unofficials rom even beat the official ones.
Interesting I’ll check it out