Picture loading


Feb 2, 2021
Hello, I've been having this problem without any quick solution, so I decided to ask here.
I have a Xiaomi Redmi Note 6 Pro, and use the storage mainly for pictures and videos. So what happened is, I accidentally deleted some data using Security, and lost a lot of pics, however, when I hide some album, the number of pics is the same as before, so for example I had 200 pics before deleting, after deleting I had 5, when it's hidden it shows 200. Once I tap on one picture, it takes some time for it to load, like there's this little loading icon on the bottom.
And what I would like to do is load all the pictures like that at once without having to swipe and load every single picture one by one. Is it possible to load all of them at once?