I applied 2nd August with Madrid, Spain. Got approved in 12 days.
About your query to embassy about going to Thailand, I imagine yes you can can, and once approved when you leave and reenter Thailand your DTV will become active.
I shared my current account, and joined my savings account to that PDF, that worked for me. I also added an explanation saying I don't keep my savings in my current account.
I arrived last Friday with a one way ticket with my partner, we both have individual DTVs and we were not asked for an onward ticket, just to prove we have a DTV, which is the email and PDF download once approved. Easy peasy.
if you have anything else like a bank statement showing your address, merge it into 1 PDF with your licence. For example Wise allows your to print a proof of account letter.
I used my Airbnb to prove my address and added a note saying I am digital nomad so don't have a set address always
becuase it would be helpful to advise those who are applying, Visa's are linked to immigration no? Some of us have never been to Thailand and may not be fully aware of the requirements.