How do I unjoin 2 sets of bones

I have 2 hands And I somehow Joined the 2 sets of bones. But I need to unjoin them. I tried going into edit mode and selecting 1 set of bones and pressing p, But it didn’t work. Thanks in advance.

The hot key should be [Alt] + [P] I think.

Alt+P then disconnect bone. Is that wut you’re looking for?