Is it hard to add some extra content with php in product short description area, or under it? For example if we need to add some text for all the products in single page later when we have more than 100 products?
We dont need to edit every product to add content?
Yes, you can add the content after the short description area at once for all the products from the Theme Options >> PRODUCT PAGE >> Before “Add to cart button” text area.
Is there possible to add custom message by category? For example we like this option, but we dont need message for all products, we need custom messages by categories.
Sorry, but we are not available for custom development at the moment. We can suggest you to hire our partners to do this job https://wpkraken.io/?ref=xtemos.studio