Hi Ralphy!
Re: "Unable to swipe between full-screens or view multiple desktops"
Am unsure whether you are still looking for answers, or posting a solution that has worked for you,
Seems you have MacOS 14.1 installed ?
Keeping the MacOS updated to the newest compatible MacOS version often sidesteps issues.
What's new in the updates for macOS Sonoma - Apple Support
says the newest version of Sonoma is macOS Sonoma 14.8.2
and "This update provides important security fixes and is recommended for all users".
Article also provides the link: " How to get these updates "
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Else: If MacOS is already using the newest compatible MacOS version:
Restarting Mac (ie: Apple Menu > Restart / Wait, and then log back in) often restores order if something is not working as expected, (ie: deletes temporary files, may update recent setting changes, re-establishes connections, etc,)
Apple Support's artiicle for MacOS Sonoma: Work in multiple spaces on Mac - Apple Support provides tips:
Eg: says:
"Move between spaces
On your Mac, do any of the following:
- On a trackpad, swipe left or right with three or four fingers. On a Magic Mouse, swipe with two fingers.
- Press the Control key and the Right or Left arrow key.
- Enter Mission Control, move the pointer to the top edge of the screen, then click a space in the Spaces bar.
If your Mac has a Touch Bar, you can set an option in Keyboard settings to show spaces in the Touch Bar. Then just tap a space in the Touch Bar to open the space."
There is more info. in the first linked article if needed.
All the best :-)