@Stephen *****
it is only available ONE TIME per entry into Thailand.
Get if available the 30 days extension or the 60 days COVID extension before you use up the family visit 60 days extension.
And somehow plan to get the 400,000 Thai baht funds deposited into a Thai bank account in your name only for the one year extension of stay based on Thai child support.
And be sure to follow the good advice from
@Tod ********
re getting your child recognized by the Thai court or Amphur in order to obtain the one year extension of stay based on support of Thai child.