With yung having recently released betas of all his mods for 1.21 to his patreons (the code is on the respective github repos and can be manually compiled) it's probably a good time to look into what needs to be done to update the Compat datapacks

Also I'm sorry for opening a porting issue I know how annoying they can be please don't feel pressured by this Issue and take the time you need

I rather wait till the mods are fully released before porting compat datapacks

You've probably seen it already but yung has updated his mods looking forward to when you have time to update the datapacks