This is a good callout, and it is true that most hand sanitizers are not effective against norovirus.
However, at the risk of sounding like an advertiser which is not my intent, there are some higher grade sanitizers out there that do kill norovirus. One is called “Prime Defense” and was originally developed for cruise ships and restaurants where norovirus outbreaks are a major concern. Companies are not allowed to advertise kill of specific pathogens like norovirus for products regulated by the FDA, hence why it is not advertised as killing norovirus (hand sanitizer is an over-the-counter drug regulated by FDA).
Washing your hands properly with soap and water is still an effective way to reduce risk of norovirus.
Wash your hands, and get back into the COVID habit of using your shirttail to touch public surfaces like opening doors, wash your produce, cook shellfish thoroughly, clean and disinfect surfaces, wash laundry in hot water, and stay home if you get it. Don't touch public things and then put your fingers in your mouth.
I was on a back country work trip about ten years ago, and everyone except one other person and myself got Norovirus. They were having profuse diarrhea and vomiting at the same time, while we all had to hike several miles to a vehicle. I can't see how anyone could leave home 🤢