Is a pending approval status for DTV a good sign for my visa application?

Unfortunately word usage too many times is definitively incorrect. In this situ, honestly don't know.

It is all madness..Thailand is schizophrenic. They want tourists they don't want tourists It will change again when Trumys tarrifs kick in there and few good tourists or long term guys. They kidding themselves if elites would come there for long ..They go where other wealthy go .lol

Just means they are finally reviewing it. Keep an eye out for a request for more information.

Unfortunately it doesn’t mean much. Lots of people have been rejected even after the status changed to pending approval.

Good, your documents were accepted.