You can have 2 separate relays on the same IPv4 address. Are you running into issues?

It has been increased to 4 and then to 8 tor instances per IP address: https://forum.torproject.org/t/tor-relays-8-relays-pers-ip-address-are-allowed-from-now-end-of-june-2023-on/8192

Corl3ss