Volume Gone on USB-Drive (APFS container)

I have a serious issue with an USB-drive. I wanted to use the drive for a Time Machine backup not realizing it will format the whole drive. I accidentally clicked yes. Instantly realizing what I did I unplugged the drive within a second.

Could you please help me to repair it? I have very important data on it.

Disk Utility Screenshot
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GPT Screenshot
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Looking forward to your suggestions.