@fen@zoner.work having not been able to afford tucking suits, my go-tos have been:

- two one-piece swimsuits layered on top of each other (ive seen a bunch of cis women wear this two so i never really stand out)

- one-piece suit + swim shorts (again, fairly popular with cis women too)

those have usually been enough to hold a tuck in place even while exercising