Is it possible to have the mod updated to 1.21.1 neoforge? its such a basic mod that without it the game feels kinda off, not gonna lie XD.

It's being worked on. It's going to require a significant amount of work, and most of us who can help are busy and/or burnt out, so be patient. You can follow the progress here: https://github.com/VazkiiMods/Quark/tree/1.21.1/dev