Hello,
Regarding the discount concern, didn’t you read our last response?
The Discount in terms of a Sale Price of a Product can be added by scheduling a Sale Price for a Product > and then the Sale Discount Percentage in the form of Label will be shown on the Products on the Archive pages as well as the Single Product page too.
After adding the Sale Price for a Product, it previews like this on the Archive pages: https://snipboard.io/mziVYr.jpg
And like this on the Single Product page: https://snipboard.io/lgzOVX.jpg
So, you just need to make sure that you have defined the Sale Price for the Products.
Best Regards