Hey, yes, earlier France was removed from the supported regions for Brave Rewards Verification. They’ve added France back to supported countries again though so now you should be able to connect Uphold. The link below has more details →
Also want to point out that the website you’re using is to view which countries are participating in Brave Rewards and can earn BATs, nothing to do with if you can verify your rewards. Even unsupported countries for verification can still participate in Brave rewards and earn BATs.
The link below is the website where the 'supported countries for Brave Rewards Verification" are listed →
Cheers!