[18.1 DB 6] RCS not available on WiFi

Has been an issue for me since iOS 18 enabled RCS - I don’t have RCS available when connected to WiFi.

I’ve tried:

• Multiple APs
• Removing and Reinstalling ESIM
• Enabling IPV6 on my router
• Disabling pi-hole and Firewalls

No matter what no RCS. Works fine when connected to cellular data.

Happened on both my 15 pro and new 16 pro. US Carrier is Verizon but also seeing similar behavior on other phones connected to ATT.

Anyone figured out a way to fix this? Is it just a beta (and also 18.0 GA) issue?