Someone else took a fancy to the hub and tried to use the wheel as leverage to break the lock resulting in damage to lock and rim but ultimately was unsuccessful so then resorted to cutting the spokes.
Would be my guess.
The bit on the rim that looks cut is probably just the joint. It’s opposite the valve which is where it tends to be.
Someone stole the bike leaving the wheel.
Someone else took a fancy to the hub and tried to use the wheel as leverage to break the lock resulting in damage to lock and rim but ultimately was unsuccessful so then resorted to cutting the spokes.
Would be my guess.
The bit on the rim that looks cut is probably just the joint. It’s opposite the valve which is where it tends to be.