I guess the normal use of shapewear is to give your body a certain shape and press skin/fat tissue around (people like to look thinner). That is why shapewear can give you more support, because it is meant to change your shape anyways. This is no real tucking though, it is more to get a result where you don’t see a bulge through clothes. If you really want to tuck, like the painful method of stuffing stuff inside and then holding it in place with a gaff, you would need something a lot stronger. There are actual gaffs on etsy (they usually look like thongs) and they keep everything inside. So it depends what your aim is and how insecure you are about your bulge. As I said, real tucking was too uncomfortable to me and never felt actually necessary.