For other people that might come across this question the answer is no. DT does not convert #tags to DT tags unless explicitly asked to do so. And there is no way to get an autocomplete list of tags when typing.
I personally use a combination of tags in the info panel and {==highlight==} inside markdown as a substitute for in-line tagging. After getting used to this method, I actually found it better than the hashtag approach employed by Obsidian. Highlights are spotted easily whenever a document is opened. Unified tag management has multiple benefits. Fewer CSS customized elements leads to a purer and better note-taking experience.
When I was a Obsidian devotee, the only thing I used in-line tagging for is to tell myself how to improve the note. #why, #unverified and #mr (stands for more research) were among a handful of in-line tags that appear in my notes. Category tags like #Aristotle, on the other hand, always belong to the metadata.