Hope it's OK to respond to this. When I first started seeing ex-T, I had a phobia of eating in public. She said at some point, we could have considered having a meal outside the office to work on that. I think she said she'd done that with another client before? We never ended up doing that, but just mentioning that it is something that at least some therapists would do.

As an intermediate step, have you eaten in front of your T before? If not, that could also be something to potentially try. Or if she wasn't comfortable eating in a restaurant, maybe you could get takeout and, say, sit on a park bench or some other location where people could be walking by so that it's someplace public.