Hi Kathleen. To be honest, I think you would be best off getting in touch with diabetics in Thailand because they would be better placed to offer advice on their favourite hypo cures. People living in other countries can try their best to be helpful but ultimately, it’s not much use to you if certain brands or products are not available where you are.
Thai food in general is extremely carby and Thais adore their desserts so you are surrounded by lots of delicious carb options really! I have visited Thailand many times and this is what would work for me hypo-wise; this is bearing in mind that I am compos mentis at very low BGs, and also my hypo cures are a bit off-book.
virtually all Thai drinks are extremely high in sugar. 100ml of one would do it for me
Thailand is a fruit paradise. You can get peeled and cut fruit in little plastic bags everywhere.
==> both of these would involve getting some from an itinerant hawker but these are everywhere, usually just seconds away
look out for local brands of hard candy and you can more or less assume they are all pure sugar (palm sugar or white sugar) because sugar-free is unheard of.
Haribo is widely available across Asia. Gummy bears and such, and these are very similar to jelly beans.
if dealing with local products, don’t expect too much from the nutritional information because even if it is listed, it might be inaccurate.
Good luck, and who knows, you might discover some new high-carb hypo treats.