It could be a skill issue but if that's the case I'd argue that introducing digital learning should have been a slower process. Anyway there are countless studies showing the differences between typing and handwriting (like this one: https://pmc.ncbi.nlm.nih.gov/articles/PMC11943480/) but I also have a story. Years ago I had a friend who was doing different neurological studies and she measured once the difference in the brain when writing vs typing. She said it was night and day. When writing the brain lit up almost completely, because handwriting engages so many centers for so many motions and memory recall etc. Typing she said looked almost the same as pressing a single button over and over. There wasn't much engaging of other motions. I found it very interesting. This was years ago before social media, I don't think smartphones were a thing yet much less tablets.

I am not saying that there is no place in learning for digital technology. It would be stupid to ignore them. But some things are better learned with pen and paper.