@Klara *****
you MIGHT (as in possibly) both get Non-O visas based on raising a foreign child in thailand who is in school on an ED visa, enter the country and then one parent apply for the "guardian" extension (taking care of the child) by showing 500K baht in a thai bank account in their name only for 30 days before you apply for the year extension AND THEN the spouse of that person applies for a "trailing spouse" extension based on being married to a foreigner who has a long term extension. I don't know if it'd work, and it'll take getting here, getting thru quarantine, going to the immigration office where you live and seeing if that would fly or not. One parent will definitely have to meet the financial requirement of the guardian extension and the other would "piggy back" on it using the "trailing spouse" reason.
As I said I don't know if it'd work or not..