And as this involves required insurance to enter or reenter Thailand...and not a visa question...
Just know that you will need proof of insurance for the TIME STAMPED into Thailand upon arrival.
In your situation with a NEWLY issued Non O as married to Thai you will be stamped in for 90 days and need three months of insurance.
And...as you are age 75+
Your best a option for the required insurance may be the Thai government sponsored COVID ONLY policy which issues at same rates thru age 99.
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Your recent post...age 75+
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