Well, it is possible to use multi-select to move multiple Apps, from a single Home Page, to folder in one go - however, ultimately, it still requires a single drag-and-drop gesture to complete the move.
The process is relatively easy, requiring little dexterity beyond that of a single drag-and-drop. This is how it’s done; it is much more difficult to describe than it is to do, so take your time to understand what is - in practice - very simple.
1) Touch-and-hold an App icon that you wish to move; do not lift your finger from the screen. First an Action Menu will appear, then disappear, as the App icons start to jiggle.
2) Whilst continuing to keep your finger in the screen, using another finger, tap additional App icons that you eventually wish to move. For each additional App that you tap, you’ll notice a small green badge, that has now appeared, will increment its count to indicate the total number of Apps selected.
3) Continue to tap additional App icons until finished. Do not lift the first finger from the screen - as this will cancel the multi-select.
4) When ready to move the App “stack” to a folder, just drag your held-finger to the destination folder - and then lift your finger from the screen. All the selected App icons will be moved in this single drag-and-drop gesture.
5) Tap the screen anywhere to exit the jiggle mode - or for iPads with a physical Home Button, click once.
There you have it. Multi-select and a single drag-and-drop.
I hope this guidance proves to be helpful in simplifying your previous attempts at moving Apps to folders of your choice.