This is such a great question. In the context of being in Spain, Portugal and the UK (lake district) within the last 8 weeks, I have seen that "normal" meals out tend to have 2 or more high glycemic index food types for the main (often super sized), often accompanied by a sugary drink, with desserts that may as well be granulated sugar; for a "reversed" Type 2, I think this would be unsustainable as a way of eating out. On all occasions in these geographies I have had to question and get the buy-in of serving staff to avoid sugar / honey (even in salads). I believe a "reversed" Type 2 can tolerate the occasional above modest quick release carbs, but due to education would not want to continue this in the long term.
If restaurants had for example No Added Sugar (NAS) as an option and standard, Chefs would be prepared and customers would find ordering easier. I realise I have commented on 1 aspect of eating out, but realise my contribution is getting long.