Ask your Dr for three months worth as I did. Buy a cool insulin travel bag on Amazon for £12-20. Have copy of your prescription with you to show at Thai airport (if asked). No issues no problem.
Any of you that bank with Barclays they do a brilliant deal re travel insurance which includes various current medical conditions you may have.
Covered for £10m which is on the policy document Inc covid. This document accepted by the Thai's for visa and Thai Pass purposes providing you name and policy number is on it.
Valid for multi trips 31 days at a time which you can extend for an additional fee up to 90 days.