I updated my Brave version on iOS (1.22 (20.12.02.00)) and Windows (Version 1.18.70 Chromium: 87.0.4280.101 (64 bits)) in order to withdraw my BAT from my Iphone to my Desktop, functionality available on the lastest iOS version.
Unfortunately, we had to wait until the next, hotfix update (v1.22.1) before QR code functionality is fully operational. Note that this is not a timed situation and you will not lose BAT in the interim between this release and the hotfix where the transfer is available. More info here: