iPhone 17 notifications not working after iOS 26.1 update

My mom has an iPhone 17. Worked great on iOS 26.0 but once updated to 26.1 it now doesn’t go off with notifications or even have alert flags that she has missed text messages. It has completely broken her notifications. My own iPhone 17 is not having this issue and I also updated to iOS 26.1. Trying to figure out anything to fix this for her. Any recommended setting changes to try?