They could add a new health boost potion, that would give you the health boost effect, which is currently not legetamtly obtainable in survival mode. It would be crafted from a potion of healing II potion plus a golden watermelon. To be specific, it would give you health boost 1, but health boost II would give you health boost 3. It would also make it easier for map makers to make stuff, as the tag “custompotioneffects” is currently broken. Not to mention that it could also be obtained by defeating a village raid or in a Pillager outpost chest. It could help Minecraft get some of it’s players back. Thanks for reading this!