The short answer is Yes and is backed by scientific studies:
This link from 2020 contains a link to one of the two studies it cites that have found microplastic contamination (link is here). As I would've expected, a root vegetable (carrots) is the most affected vegetable.
Now, a person could say "Jurp, that article you cited is from a website that is dedicated to getting rid of plastics." And they'd be correct. This link, however, is from the US National Institutes of Health (NIH) and is also from 2020. It shows definite microplastic contamination in fruits and vegetables.
Going further down the links chain, the post I linked to above was cited by another paper at NIH (link here) that concentrates on toxic effects of the plastic in our food supply.