I might suggest checking if you have third-party cookies blocked under: brave://settings/shields
BLOCK COOKIES: BLOCK THIRD-PART COOKIES
might be the easy solution…
For further cookies managing see below:
Coincidentally, I just shared the post below with someone else, I wrote up how you can take control of your cookies here:
You can also see how others manage their cookies in that recent post I mentioned here, if you’re curious: