I currently live in the U.S and we’re planning on moving to Thailand this June. I plan on applying for my DTV next month but when you add your spouse to your DTV, does there visa have any restrictions or would it be the same DTV like will they be able to leave and come back freely on their own?  and is it better to apply online or at a consulate general office?
TLDR : Answer Summary
When applying for a Destination Thailand Visa (DTV) and adding your spouse as a dependent, their visa will have the same conditions as yours, allowing them to leave and re-enter Thailand independently during the visa validity period. It is important to apply online as the eVisa system mandates that the primary DTV holder must be approved before the dependent's application can be submitted.
DTV VISA RESOURCES / SERVICES