I have the same issue. I've updated both iPhone and Mac to 26.2, and neither have the Urgent toggle. I've enabled the Alarms toggle for "Allow Reminders to Access", and the reminder is saved to iCloud.I cant set an alarm for reminders.
The urgent toggle simply isn’t there for me
Strangely, I noticed that if I restart my iPhone and open Reminders, the toggle shows up for about 1 second and then disappears, and that is reproducible the first launch of Reminders after each restart.

