Minecraft Child Permissions

This is ridicolous ...

I've added some funds to my child's account, it is visible there, so it she should have a possibility to proceed a purchase.

When running Minecraft game and log into my child's account we tried to buy a game - impossible!

There is an error:

"You have no permission to purchase. This account requres parental permission to puchase"

I have no idea how to accept this, how to give a permission . There is no such a procedure!

I've checked all the settings in my child's account (in Family Safety), one by one, and there is no setting that match my problem.

In the error window there is also a link to several general topics, but none of them even touch my problem.

Somehow (can't repeat that way) I've entered the "Xbox console settings". I've change some setting in my child's profile (related to purchasing).

... and finally that allowed me to make one step forward - now I can buy a game using my child's account (I'm doing that in Minecraft). But ... I have to pay again, third time!

I've already donated my child' account (it is visible in the Microsoft account settings) but this in not visible in Minecraft.

Dear Microsoft the problem with Minecraft W10 described above happens even for adult accounts. Of course I've tried also with child account with required permissions. The same happens in both cases. So it's not related to child's account settings if adult
account cannot connect to the multiplayer servers. Please do something with it.

You have registered your "main account" as child account (under 18+ of age) this is why you are not able to play online and Mojang support suggested you to set up a different account

Unless your parental account gives permission your child account will not be able to play other realms in Minecraft

Does the account have an Xbox Live subscription on it? Or is another account sharing Gold?

You can't exactly change a child account to an adult account until the child has actually turned 18. However, you can change their permissions. You need to log into the adult account, and under family settings, you can change the permissions of your child's
account.