Hi
There is several methods to improve your swimwear sales.
1, install google & youtube app, submit your products to google shopping, and advertise, 20$ per day.
2, build high quality backlinks, rank your keyword higher on google.
3, advertise on tiktok, 20$ per day.
4, social media marketing, like facebook, instagram
5, use Shopify free app to translate your website to multiple languages
these methods will improve your sales quickly, here is my swimwear website: https://www.qikini.com/
you can see the result as follow:

