WOW! thanks for replying so quickly!
In relation to point 1, it is true that the “Caravaca” product that is shown in the “single Product” edition works correctly.
As you show in the images.
The problem is that Caravaca is a product without the “manage inventory” option because it is a test product.
https://gyazo.com/ae17ce71058ad88534aa280b37ff54a2
https://gyazo.com/98b291bf09bcba4a506c528c5fd571d1
All the other products are inventory managed as normal, and that is where it is wrongly displayed.
https://gyazo.com/a4a16818b3093121f25a561b8209eda4
https://gyazo.com/6b786e41c490cfe82adefd6529fe292d
The problem is replicated when dealing with variable products
https://gyazo.com/dca3c99ee3c99316801e3c8e23eac497
The “Collapsed Reviews On Mobile” is now working, thanks.
Thank you very much!