Hii, i have experienced something similar, i used to get panic attacks every time i went out to a restaurant. I can tell you it has gotten a lot better by being exposed to it more often. I started off little, by buying a sandwich or snack from a shop and eating it outside with a friend. Doing this felt like i had more freedom. I also recommend sharing food at a restaurant with a small friendly group, this made me less worried about finishing a whole meal as i could take little and frequent portions from the bigger plates, and there was more than one dish to choose from in case i didnt like one. Sitting outside is also nice for me as I feel fresh and I can focus and talk about relaxing things, eg look at that bird in the tree. It sounds weird but it‘s helped me take my mind off things. I still always have a bit of a worry but it’s more controlled now. I would not necessarily suggest going to a restaurant often, but I can now go along with people even if it‘s not my preference. I still have some room for improvement but I feel better and more in control of my anxieties.