Make it simple, your name only. Ask if the bank can designate your wife as the beneficiary of the account if you die.
If not, get a will, which is probably a good idea anyway. Things like designating her to decide your medical care if you are disabled and unable to decide yourself.
Scan the documents that that will need to be printed for each subsequent yearly extension, such as your bordered marriage cerificate, passport ID page and contents, house register, wife’s ID, and whatever your local office requires that isn’t a certified or original document.
That way you won’t have to find them each year to print them again.
Your impression may be true or false, a visit your local Thai immigration office should be on your calendar soon to get the correct information from the most knowledgeable people to maintain your legal status in Thailand.
You will need the official documentation stating you have joint custody.
If you used a Thai legal professional for your divorce they should be able to help you with the documents that immigration will need when you get that information from immigration before signing the final decree of divorce.