iPad problems

When my iPad (7th Generation) became very sluggish I decided on a factory reset. I backed up to iCloud using my iPhone 11.

When I installed from iCloud (which I have done before) nothing was the same, different wallpaper, icons not in folders etc. reluctantly I started again. On this attempt some of my icons where in the folders I had created, the rest where scattered about, my wallpaper was my own. I am now finding that apps won’t accept my passwords even though I know they are correct, if I shut down my iPad one app won’t work unless I reinstall it. If I install a new program the icon doesn’t appear on the desktop but does appear in the recently downloaded apps folder as well as the apps library.

Any help would be very much appreciated.