>>4113977I don't frequent anime communities in the Internet (this is as close as it gets) so I really can't comment on whether Franxx is forgotten or not. Though given the fact that new merch is still coming out and old merch is getting re-released I'm gonna guess it does have some staying power.
As far as fanfics go, I only read Mastermind in the Franxx which was completed back in 2020.
The manga ended with Klaxohime as the final boss, meaning no space wedding or HiroTwo dying and reincarnating later. Didn't like it as much as I liked the anime but ymmv.
