@asdfgasdfg the only thing you can do is submit a Rewards Support Ticket at https://support.brave.com/hc/en-us/requests/new?ticket_form_id=360001302431 to see if they can take a closer look. No guarantee they’ll remove the flag from your account.
You may also want to check out PSA: Current Rewards Issues (June 2023) *UPDATED*
Once you create a support ticket, reply here with your ticket number.