I've just been approved for DTV in France, which took 1 month! My situation: freelance digital marketer.

First of all, I filled in the application form on thaievisa (flight, hotel, proof of residence and bank statement for the month of June). Then after 3 weeks they contacted me again and asked me to create a portfolio, all merged with Avis d'Insée (proof of auto-entrepreneur status in France), a text portfolio (1 Word page) explaining the nature of my work in French AND English, my last invoices for the last month, last month's bank statement, and also a screen copy of the platform on which I'm registered to interact with clients and see my activities/profile).

So I provided these documents (about ten pages merged into a single pdf document) and voilà, there was a 'pending approval' status that lasted 2 days and I was approved.