https://support.apple.com/en-us/HT209096
^^ Apple has a list of all countries and carriers with eSIM.
Do these carriers offer the same tourist SIM rates as a regular SIM card though?
Going to Malaysia and Singapore in a few weeks and super bummed about this. Was going to buy a new phone (have iPhone 12 Pro Max) but may just go to the Apple store and spend $69 on a battery replacement (starting to struggle for it to stay charged all day).