It can be any kind of food a restaurant, cafe or shop normally sells, though not raw ingredients. If you're vegan, the app has a vegan filter too, so it will cater to your food consumption habits.

Regarding Covid, I think this is a very personal decision, based on everyone's health and circumstances. From my perspective, I just followed the rules and used a bit of common sense. I did catch Covid eventually last April but it was milder than a regular cold and lasted just 3 days. Likely the 2+1 shots helped. As soon as things opened up, I went back to my usual normal of eating out, going to gigs and concerts. My mental health needed it.