What is your idea about?

Universal Ores got a 1.21.1 port, but Promenade skipped it.
Is there a chance that this mod will also be released for 1.21.1? This version is more popular for mods than 1.21.4/5. As well as 1.20.1 is more popular than other 1.20.X, etc.

Despite the fact that I never do backports, I've actually looked into this and found out it requires a ton more invesment than other mods especially due to the usage of latest tech for data generation. I hope I find the time to get a port done, after I finish updating Culinaire and Artisanat, but I can't promise anything, especially if 1.22 comes out before.

Got it.
I guess Mojang did a really good job on the technical side between these versions.