I have already sent a query to the theme designer. Thanks for the help.
The other query is pending, about the thumbnails. It is possible for the thumbnails to be larger and more proportionate (keeping the ratio of height and width of the file). We have tried to do it using css but it doesn’t quite work.
Yes, this is a live site. We are currently working on the online shop, configuring the variations, uploading products and finishing the tests.
But you can deactivate the plugins that you think necessary and carry out the tests you want, activate another theme or whatever else is necessary. I have made a backup of the web page for more security.