@afafternoonbiscuit Picking up on your questions about travel, it really depends where. For flights, you can book a GF meal,. I always take snacks just in case the specials weren't loaded, but it's never been necessary.
We've booked an apartment a few times in Belgium, which is not the easiest. France is ok, Spain and Italy are great, with a larger number of diagnosed coeliacs, so provision is good. Japan was really difficult outside Tokyo, so we ended up doing a cruise (ships are generally great). It's the amount of soy and also the stealth wheat in rice in Japan.
We tend to go for apartments in the US...big cities are ok, others are less so. Chains like Hard Rock and Chilli's are fine, but the only thing I could eat in a BBQ place in Memphis was a side salad. Supermarkets generally have a GF section, especially in Spain and Italy. There's always a possibility of something...in the middle of nowhere, Tennessee, I ended up with a burger (no wheat, no bun), which was clearly so odd that the kitchen staff trotted out to see the strange Brit.
You can get translation cards into all kinds of languages explaining you are coeliac and what you cannot eat, and also join the local gluten free group for your destination. For example, I'm on the Brussels one, as we go there quite a lot. And the Japan group were really helpful with the kanji when my phone wouldn't translate.