Yes, they are. You can track the status of it and everything else they are working on at https://github.com/orgs/brave/projects/28#card-59568971
And more specifically, you can see where they are setting up for us to manage our own wallet slots at https://github.com/brave/brave-browser/issues/18572
Hi there folks! Wanted to provide an update here. Development has started and things are moving nicely. We should have a completed change in our staging environment by late Q1 (so we can begin testing). If testing goes well, we’ll have this available to users a few weeks after that
In the meantime, you can tag @brave/rewards-support here on GitHub or create a post on Community
So we should be getting it here within the next month or two