Is there no more keyboard shortcut option for the hand tool for scrolling horizontally in Calc? I know I can use Shift+Middle wheel, but it’s actually more efficient (for me) to just press the middle wheel and drag the sheet.
EDIT: I failed to mention that my OS is Kubuntu (fully updated). Maybe that’s the difference?
Autoscroll? 
It works for me:
LO 24.8.7.2 and 25.8.0.4 on Windows.
If that worked for me I wouldn’t have asked about it, lol. I went into Tools > Customize, but there’s not even an option to create a keyboard shortcut for it.
I added more info in my original post., Apologies for not doing it the first time.
Sorry, I overlooked that. Will try later on Linux.
In LO Calc (Windows), I use Alt + PgDn / Alt + PgUp to move one screen left / right (the same keyboard shortcuts as in Excel).
The corresponding uno commands (.uno:GoRightBlock / .uno:GoLeftBlock) have parameters, which is probably why they’re missing from Customize Keyboard dialog.
In any case, we can write a macro to move one screen (or half a screen) left / right and assign it to any convenient keyboard shortcut.
Thanks for those suggestions. I guess I’m just missing the hand tool where I can just drag the sheet. Keyboard shortcuts are fine, though. Shift+Middle wheel is the closest to it.