Cannot delete/erase APFS volume
You can try :
diskutil zerodisk force diskX

Where diskX is to be replaced by the internal SSD indentifier.
But given the previous errors, I doubt the effectiveness.
The best solution is to remove this SSD by following this link: https://www.ifixit.com/Guide/MacBook+Pro+15-Inch+Retina+Display+Mid+2015+SSD+Replacement/48251