I know this questions has been aske before" Why Google is not showing my review stars in search results?"
The answer would normally be, Google decided not show it. I used to have my store on woocommerce and Google would show the stars and reviews without an issue.
I went to the markup tool on Google search console and wanted to highlight the reviews and stars but even on the markup tool, The reviews are not showing with complete data.
For example, I have a product with 2 reviews. The number of reviews is showing but the stars are not not showing. Also the aggregated reviews is not showing. The content of the reviews is showing though.
This tells me that there is an issue with the app itself and not something that Google decided not show!
Can someone from Shopify app development team look into this problem and fix it?