A person taught me kindfully that I can send GitHub PR to publicsuffix. But the owner of publicsuffix said:
That request does not comply with our guidelines
So disco-v8 who is administrator of mydns.jp sent request to the form (as mentioned in the GitHub PR) in few weeks ago, but there are no replies, no response, and nothing changed about limitation.
I am not sure if it is the reason for your domain not being processed yet, but the PR still lacks the correction to the #3 item I warned you about in February: