Greater mobility assistance/Toggle movement/Toggle mining and using

Currently Minecraft Java Edition has toggles for Crouch, Sprint, and Auto-jump, which are all greatly appreciated. However currently users with mobility issues like me often still need to get mods to assist with things like going long distances, mining for long periods, or using things for long periods.

It would be really nice for there to be native options for toggleable walking, and assistive mining/continuous using of items