Diabetes.co.uk suggests eating some carbohydrates before retiring:
https://www.diabetes.co.uk/Diabetes-and-Carbohydrate-diets.html
(The NHS website has a link to that forum, so it should be trustworthy).
This is a trusted site in my opinion, so you might find something suitable listed in their selection of healthy high-carb foods:
https://www.healthline.com/nutrition/12-healthy-high-carb-foods
(NB: Note the warning that oats may lower blood sugar levels, which clearly isn't what you want if you're experiencing hypos). Perhaps an apple before bed might be a good idea though?
It would probably still be best to talk to your GP (or to someone at your diabetes clinic) before embarking on any course of action though.
Remember that Diabetes UK has a helpline on 0345 123 2399 and Diabetes.co.uk has a web forum where you can get advice from others with diabetes:
https://www.diabetes.co.uk/forum/
Perhaps a post in the 'Food, Nutrition and Recipes' section might get responses from people who've experienced similar problems to your own?