Minecraft Bedrock GameMode and Difficulty Lock

I have been a Java player for a while, but in the last year I changed to Bedrock mainly because of the better performance and being easier to play with friends.

But the settings menu on the Bedrock just lacks some features that for me are a necessity:

- Being able to lock the Game Mode (maybe only being disabled using a password or an extra security step)

- Being able to lock the Difficulty (similar to previous and/or to Java Edition)

- Being able to change the Simulation Distance after creating the world

- (Possibility) to play using KeepInventory and still being able to keep the achievements.