Tried a pair of tucking underwear last weekend. I really like the result : r/NonBinary

Tuck Buddies 2.0 KIDDOS - boyshort style tucking underwear for transgender kids - unicorn party

The Pride Pin Bundle – Unclockable

Tucking, made easy. Tuck it. Slip it. You're done.

Unclockable Tuck and Tape with T-Tape and the How To Tuck Guide

Trans Nonbinary Pride Gaff for Soft Tucking

Thedollsnyc Transgender Everyday Tucking V-string Gaff

affordable gender affirming underwear? : r/NonBinary

3 Pack) Tucking Underwear Cotton, for MTF transgender transwomen – tcomfifits

Non Binary, Tucking Knickers, Trans and Proud, Trans Female Underwear, Ready to Wear, All Sizes - Ireland

Comfortable Thongs Women's Underwear - MeUndies

Transgender children are getting their own underwear collection