This all of a sudden started to work a few days later
I did send an email to bitnodes.io but got no reply, so it might have been coincidental that it started to work.
Thanks to all those people that contributed.
Hello, can you tell me how you contacted bitnodes.io? I also have two ISPs and both are "pending review" with both ipv4 and v6, I have only ipv6 public.
Thank you!