if havent looked yet maybe you can try dark colored suits with open sides or just a really low back connect? they sort of "cinch" the waist visually, and if you havent had bottom surgery and youre more worried about tucking to swim you can pair that with swim shorts, something like this sorta

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humankind makes gender neutral swimwear that layers well, if you want something cute to wear over a one piece! a bit pricey but the quality is amazing and the color options are great

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