O MY GOD I FIGURED IT OUT! Today I found an old cup holder from when I used to play soccer, because I have not played soccer since middle school its a bit small and it works perfectly for tucking, it holds everything in place and I can wear panties over it and you can even tell, also its pretty comfortable.
Edit - Homemade gaff before everything to make it nice and tight, than cup holder to smooth it out
Edit 2 - Ignore the gaff, its to tight, cuts of the circulation, just pull the cup holder up to hold everything in place