As AlphaTango414 said, there will be a folder for the app you are using. I use Google photos and when I press on the 3 bars to the top left, it shows me several things one being Device Folders, when I press that it then gives me the camera folder, WhatsApp images, screenshots and other apps images. I then have the option to back-up these folders with the images inside them.
As you're probably not using Google photos app (which I recommend) then it may be worth seeing if there is a settings app in the album app you are using. Other than that a file explorer, like Solid Explorer and this will locate the folder for you as to where the images are being stored.