First of all congratulations on the realizations you've had gender-wise, that's so exciting! <3 If you want to talk about anything else in a safe, confidential space feel free to DM me on fedi. :-)

And gosh I've mostly worn dresses (or pants where it really didn't show) and so I actually have never tucked! Plus I had an orchiectomy two years into my transition and so it made it even less of a thing after that.

Let me do this for you though: I'll pitch this from my fedi account and we can see what kind of replies we get. I'll ask a loved one too as I know she's had good luck with tucking underwear. Check back on this thread on fedi for hopefully some good answers. :3

Wishing you the best!