MFA fatigue or badly managed notifications fatigue ?
Is it just notifications fatigue or really MFA fatigue ?
When I have an MFA notification, I'm expecting it, and take a careful look at it (ain't no SMS, but dedicated app) and I also check the notif code if any.
No risk to accept if not expected !
If, at contrary, your phone is buzzing every second, like some colleagues, then, yes, I understand you could accidentally accept when you were just spamming accept on dozens of notifications.