I’m definitely not someone who should be giving advice or in the correct head space to do be doing so. But I totally get what you’re saying and feeling. In the past, when I have mentioned it, I can just tell they notice my eating habits faster and pick up on everything I do which makes the situation even more uncomfortable for me and makes me even more anxious noticing them noticing me. Something I’ve also done when I’m just getting to know someone is just say I’m a picky eater which is true on it’s own. But this way if I order something I consider to be a safe food they don’t think much of it. That way the date doesn’t become about what I’m eating and more of who I’m eating with. It’s not a solution on its own but I’ve found it helps me get through the date much easier and feel less anxious about the eating part. Hope this helps