The iOS Photos app has NO outside folder recognition, whatsoever.
So sorting those folders on your PC will not be recognised by an iPad/iOS/iPadOS by the Photos app.
There will be no easy way to accomplish what you want to do on any iPad.
Sorry.
You will have to re-organise these images from your PC from within the iPad, no matter how you organised these on your PC.
Sorry.
Any importing of photos/images is going to start by importing these photos/images into the iOS Photos app.
So, I do NOT think using other third party iOS image organisation apps are going to help you as most of these types of apps duplicate images to organise within a third party app, leaving you with the extra work of either keeping the original photos/images in the iOS Photos app OR deleting these images from the iOS Photos app, once the duplicate images are re-organised from within the third party photo/image organisation app.
Sorry.
I will still list an iOS App Store link to a very good photos/image organisation app.
Photo Manager Pro
https://apps.apple.com/us/app/photo-manager-pro-6/id1076480192
Another direction to follow,
You could import these images into an iPad one folder at a time from your PC into the iOS Photos app.
From the Photos app, create a new album ( or folder, if a newer iPad with a newer iOS version ), name it and bring these images, one PC image folder at a time ) from the main Photos library into a newly created album or folder.
Basically, creating and organising these images from within the iPad/iOS system structure, again.
Tbis all has to be done by a single full computer folder of images at a time to make the whole iPad import process easier to accomplish and handle.
No other easy way to do this.
You could just dump all of these images into the iPad Photos app, but you will still need to organize all of these into individual albums within the Photos app, anyways.
Not sure which way would be faster and more streamlined a process.
Any way you do this means some more serious work to still do.
Sorry & Best of Luck to You!
