why did all of my Minecraft worlds get disabled with out changing the family settings or...

I believe you have to allow them to create and join clubs as well. After you change all the parental settings you have to log out and back in. I did this through the Microsoft account and still got the error. Then I went into minecraft, settings and logged
them out of Microsoft from there and back in. All of a sudden it worked. Now my kids are playing in a world together. I hope this helps!

yes i was signed into my parents account and my child account was signed out and i clicked family settings and clicked my account in the family settings and tryed to change the privacy settings on my xbox 360 but it didnt work and i all ready tryed on my
computer.

Note: i did this on my xbox.

There is a chance that your achievements are disabled for that world, if you installed a mod or enabled cheats to turn on keep inventory or similar things they will be disabled in that world permanently, unfortunately there's no way to fix this
without starting a new world altogether, if this is the case there isn't much that can be done sadly, you can check if achievements are disabled by opening your game settings while playing in your world, if they aren't disabled then try uninstalling and
reinstalling minecraft. It should keep your player data, I hope this helped!

It's on the XBox so no mods (I don't know if you can but I know I haven't) but I did find the "cheats enabled" and I don't know why. I've never done anything with cheats, I would just use a creative world if I wanted everything.

So, because this got ticked in my world somehow I'm screwed? :/ I have years on this world, I'm not interested in starting a new one.

Sadly you can't reverse it to get achievements, but you can still have fun on your world and if you ever want the achievements you can start a world just for achievements, I know it's not a very good alternative but it's about all you can do, sorry.

There is a chance that your achievements are disabled for that world, if you installed a mod or enabled cheats to turn on keep inventory or similar things they will be disabled in that world permanently, unfortunately there's no way to fix this
without starting a new world altogether, if this is the case there isn't much that can be done sadly, you can check if achievements are disabled by opening your game settings while playing in your world, if they aren't disabled then try uninstalling and
reinstalling minecraft. It should keep your player data, I hope this helped!

It's on the XBox so no mods (I don't know if you can but I know I haven't) but I did find the "cheats enabled" and I don't know why. I've never done anything with cheats, I would just use a creative world if I wanted everything.

So, because this got ticked in my world somehow I'm screwed? :/ I have years on this world, I'm not interested in starting a new one.

Did you try to sign in to https://account.microsoft.com/family/ ?

Can you send me a screenshot of your account on the webpage above showing that you're not on a Family Group?

Because if you're not on a Family Group, you should be able to change your privacy settings and shouldn't receive the "why can’t I change my privacy settings?" message.