The list of supported regions for connecting a custodial partner is at
Any other list you’re saying is different and is not related to brave rewards.
If you’re talking about restricted regions for Uphold where UAE isn’t included then that’s a different topic. It is for regions which don’t allow Uphold to operate or regions where Uphold isn’t able to operate. It’s only about Uphold accounts, the list about regions supported for connection of Brave rewards to custodial Partner is different cause of added rules & regulations.