Info option to block calls unavailable in iOS 26.2.1
How to block a caller on iPhone iOS 26.2.1
The usual Info to block no longer gives me that option.
iPhone SE, iOS 26
This bug that seems only to affect the SE has not been fixed in 26.3 either.
In recents you can press the Home button and then press the Phone icon again, maybe more than once, or you can block a call in Contacts if the caller is indeed a contact.
Report it, mention this is specific to the SE https://apple.com/feedback