My T is doing it from his office (there are very few people in the building at the same time as T) so it is nice to see him in our same space.
My T will often eat/snack during sessions with me because we talked through it and I am OK with it. He does it at the very beginning and doesn’t take very long. The way you mentioned your T eating breakfast made me feel a little weird... like she decided to sleep in and have a leisurely morning nashing on breakfast while chatting with you... that would bug me.
I know most of us are working on figuring out the boundaries of this new way... good luck!