AIO: Restaurant customer/employee kept going into kitchen and behind bar while eating

I’m out to lunch at a local sushi restaurant with my partner and I notice that a woman at a table near me keeps getting up and going behind the bars, drink station, and into the kitchen area. She was doing things like taking her dishes to drop off, to refill her drinks, and the get plates. None of the staff seem to mind so I assume that she works here. However, she’s not in uniform and is dining with a man who I assume is a friend/partner. She got up probably 10+ times and I never saw her wash her hands before entering any of these food serving areas.

I’ve worked in many restaurants in my life and would NEVER do this as it’s unsanitary. My hands aren’t clean because I’m eating and I wouldn’t want other customers to be bothered.

Am i overreacting if i contact the restaurant and let them know that this is unsanitary?