A simple update to 1.20 and 1.20.1. Not sure if 1.20.2 would work, I'll update it to 1.20.2 as all the mods update to that version.
This version will definitely not work with anything below 1.20.
But wait, there's no Charm for 1.20 yet? There is - https://github.com/svenhjol/Charm#charm-for-minecraft-120x.
Initial MR release