I have a 2019 TC (Canada), and I'm also doing a van conversion (75% completed yay!). I came across the same questioning.
For simplicity, I opted for a quick little cut through the floor, added some hinges and there I had a little door to a "hidden" storage.
I don't have a lot of photos of that part of the build, but there you can see the hole freshly cut (no door yet):