Maybe Biomes o´ Plenty, because you get more biomes. Quark is not bad as well, because it is very Vanilla+. If you really want to go into modding, maybe the Twilight Forest or Aether Mod if it is compatible, or any other really good dimesnion mod. If you are more into management, try Tektopia. The other mods by tango tek are alos really good.
You can give the player a carrot_on_a_stick in the offhand and the carrot_on_a_stick has no texture and you cover the offhand slot. This has the downside,that you can not use shields or totems, etc. in the offhand, but you cann detect right click with any item. Instead of the carrot_on_a_stick, you can also use a warped_fungus_on_a_stick. Hypixel does not use datapacks. They use plugins.
This is not an idea for your datapack, but instead of google translate, you should use DeepL. It is the best translator I know and 1000x times better than google translate.