Thank you for contacting Rank Math and sorry for any inconvenience that might have been caused due to that.
I am not sure what do you mean with “does your plugin affect this in any way?”. If the WooCommerce module is enabled in Rank Math, Rank Math will automatically add the price of the products (and other data) to the page’s Schema so it can be detected by Google and if it wants, shown in the results.
If you test the page and there are no errors shown then there is nothing to worry about and it is just a waiting game until Google decides to include Schema for your website. Please note that although Rank Math adds proper schema to your website, it is ultimately Google’s decision if they want to include them with your website or not. It depends on a lot of factors, authority and backlinks being just the 2 of them.
Here’s what Google says:
“Google does not guarantee that your structured data will show up in search results, even if your page is marked up correctly according to the Structured Data Testing Tool.”