Hi Roman!
Honestly, this depends a little on:
- What the product is
- How competitive it is
Because in some cases, if it's a clear/straightforward product and there's not super high competition, you could possibly rank with one page. But if the product has a lot of search query variations, is complicated, and has high competition, you may need more content.
As Martin pointed out, you can build the authority of these pages through other content - whether that's internal content linking users to the product, or external.
You can actually also try running facebook or instagram ads for the product - perhaps for some direct traffic benefits - but also because this can sometimes boost the rank of the page you're advertising.
A final detail - make sure your top targeted keyword in the title tag
Not a huge boost, but will help a tiny bit!