Minehut will update once Paper Spigot and most major plugins have updated to support the new 1.16 update. In order to connect to a playerserver via 1.16, the playerserver must have ViaVersion installed. This doesn't mean that 1.16 features are enabled on that playerserver. 1.16 features (blocks, mobs, terrain, etc.) are not enabled nor accessible at this time on Minehut. They have predicted roughly a week or two until Minehut updates.
Minehut is NOT 1.16, you can just connect. Worlds are known to randomly reset unfortunately. I suggest you backup your world regularly via downloading it with /dl world (worldname) or a world downloader mod.