Someone else run into this problem and was able to solve it?
P.S.: I would appreciate a tiny praise for my amazing circles.
Edit: As @Pikaaroon pointed out:
https://support.seaofthieves.com/hc/en-gb/articles/360000362767-Sea-of-Thieves-Scale-Test-FAQ
Quote from page above:
My Xbox insider status shows 'pending'
If you are receiving the "Pending" or "Unauthorised" message on the PC or Xbox versions of the Xbox Insider Hub, your application to be an Insider has not yet finished being processed. This can take up to 24 hours to complete.
If after 24 hours you still having issues, please contact Xbox support: https://support.xbox.com