Maybe take someone/something with you who helps you feel calm. And if not you might have to start smaller than going to a store and work your way up to that.

bring a comfort item, something small you can fidget with. my anxiety is connected to my ADHD so not sure that's helpful but lil fidgets help me

Idk how anyone or you especially would feel about this but I got my kitten registered as Esa for my social anxiety and trained him to walk on a harness and leash as well as just sitting on my shoulder as I walk around I focus on him when I'm anxious he also makes for a great conversation starter and is helping me to pull out of my shell and actually talk to new people

It’s hard especially since we been in this pandemic I use to be a social butterfly and now I feel disconnected from family and friends and the world it’s sad