The official rule is you can get an extension. In practice immigration really really don’t want to do one.
I can only speak regarding the Phuket office but there may have been a dozen successful extensions done there but my guess is they won’t try again. They probably needed 3, 4 or more visits to satisfy the requirements.
Sure it can be done but for the majority you’ll find a border run by land or air will be a much easier way to get another 180 days.
1st time in person but with a DTV most won’t be doing a second before leaving and returning so that would be their “1st” report again after entering Thailand