Recover songs mistakenly deleted from my iTunes library while on my PC

The restored songs will be back in the folders they came from, but they won't have been added back to the library automatically. Also there is no guarantee that all were in the bin when you looked. Windows at some point may choose to free up items in the recycle bin automatically if you are low on space. You can use File > Add Folder to Library to reimport any of the removed items. They will have a new date added date, no ratings or plays, and will no longer belong to any regular playlists they might have once been in. If you have a backup and can restore a version of the library database from before the incident you might be able to get those details back.

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Are they in the recycle bin such that they could be restored and then added back to the library?

Do they exist on any of your devices from which they could be recovered?

Do you have any form of backup?

tt2

See Recover media from an iPod - Apple Community.

tt2