I haven't been able to repro because I don't have an iPhone but at least two people have reported it on mobile Safari.
Knowns:
- Person A is not using iCloud Private Relay
- Person A said it "used to work"
- Person A said other mobile browsers also don't work
- Person A said it works on their iPad
Unknowns:
- Versions of iOS
- Versions of Safari
I haven't been able to repro because I don't have an iPhone but at least two people have reported it on mobile Safari.
Knowns:
Unknowns: