I am aware that upvoted posts make it to https://kbin.social/fav however that just doesn’t work well as I already have 1,000+ pages in there. Moreover, that only registers upvoted posts and not comments. A workaround would be to just use boost, and only upvote when you want to “save” but that is just not conventional imho. The ability on /r to simply save a comment or a post is truly basic but effective.
EDIT: Relevant Codeberg issue
I have this convoluted system where I boost something here, then log into my Mastodon account and bookmark it there…
It works as a stop gap so I don’t lose things, but would DEFINITELY be better to not have to do that lol