Thank you for the elaborate reply!
I actually made a Lasers & Feelings hack in the past, it was a great start for me to try writing a game and to indie ttrpgs in general. I see now that it would be nearly impossible cataloging every emerging system. Perhaps what I seek is more of a comprehensive blog post about dev beginner-friendly systems and their functions. Maybe I’ll even write one myself someday.
Thank you for the insight regarding this forum. It makes much more sense for me now. I was genuinely suprised when I realized there was no dedicated subreddit (merging r/itchio and /r/RPGdesign/) for this. I’ll just continue posting in here if something comes up. Thank you for being a moderator!