I found out about njal.la about 2 weeks ago, they give you one ipv4 and one ipv6 for €5 monthly, with all ports open.
No GUI though, they provide OpenVPN and Wireguard configs, which works fine for my server.
I think they only have their servers on Sweden IIRC, but at least in my experience the speeds with the Wireguard config have been great.
So far I don't have any complains about them. Having all ports open makes setting it up on the torrent client really easy.