For those thinking about applying for the DTV in Taiwan, here is an up to date statement (received 5min ago).
The link in there is the one you probably already know if you researched Taiwan:
[members only]
So it's still a walk-in, no appointment kind of thing. ๐
TLDR : Answer Summary
Recent updates indicate that the application process for the Destination Thailand Visa (DTV) in Taiwan remains a walk-in service, allowing applicants to apply without a prior appointment. Additional inquiries include the possibility of using a sponsor letter instead of showing a bank balance of 500,000 baht, and whether the visa can be issued on the same day.
DTV VISA RESOURCES / SERVICES