Can I return to Thailand under visa exemption while waiting for DTV approval?

Hi, apologies in advance for the post, as I've seen multiple similar questions on google search linking to this group, but have been unable to see the comments.

I'm wondering whether it's possible to return to Thailand under visa exemption while waiting for my DTV to be approved. I've already been asked to submit additional documents (passport pages, proof of stay outside of TH, bank/income statements, etc).

Additionally, was wondering if anyone applyed for the DTV evisa system in Malaysia, how long the application took for approval? Thanks!