Today, I somehow accidentally deleted gigabytes of files from the Creative Cloud folder on my computer. I don't think I synced the files, my account tells me I have no synced files. Didn't realize that was necessary. Have I lost them all?
First open the CC desktop app and look at the Cloud icon in the top right tool bar to see if Suync is paused.
If it is then nothing got uploaded to the Adobe cloud storage system.
If it is active then whatever was in the folder it is linked to got deleted from the clouds. Look in the Deleted area.
As to whether you can restore those deleted file depends on several factors.
First STOP using that computer.
Try a File Recovery utility. Google File recovery Utility.
I moved your post to a better forum, CC services.
Some people think, because some web sites say, that when you start using Cloud stuff you don't need backups any more. This is plain wrong, and very dangerous advice. Be sure you have good, and tested, backups.
Have you looked in the Trash/Recycle Bin?
All deleted files are supposed to go to those.
Some did go into trash, roughly one third. No idea why those files and not others. Clearly should have had better backups.
Did have some of them archived in Dropbox, so not all was lost, but it very hit and miss. Lesson learned.
Check your Recycle Bin. Nothing gets permanently deleted until you clean out the bin.
Similarly, deleting files from your Creative Cloud storage space is a 2-step process.