Yes, feel free to host game elsewhere and post a link.
Check out this thread as well https://itch.io/jam/human-game-jam/topic/1924180/make-sure-to-join-our-discord
Note that you also don't have to implement NEAR login for the scope of this jam – main idea is just to demonstrate game idea. We'll be giving extra grants after game jam for actual integration with NEAR and production launch.