To recover data from MBP's SSD, what you need to do first is to try to mount your SSD. If you can't mount your SSD, you can use Disk Utility, power cycle, or repair the SSD from Disk Utility. If these ways cannot help you to mount your SSD, it might be physically damaged, and you can send it to local technicians for reparation or replace it with a new one.
After you mount your SSD, you can use third-party professional data recovery software to recover your data from a corrupted MBP's SSD. I recommend you iBoysoft Data Recovery for Mac.
iBoysoft Data Recovery for Mac is reliable data recovery software that you can get back kinds of data, such as photos, videos, documents, etc. from SSDs, USB flash drives, HDDs, and SD cards easily and securely on macOS and Mac OS X.
You can follow the below steps to recover your data from a corrupted MBP's SSD.
Step 1: Free download and launch iBoysoft Data Recovery.
Step 2: Choose your MBP's SSD.
Step 3: Click Search for Lost Data.
Step 4: Find the files you want to recover and preview the files.
Step 5: Click Recover and choose a location to store.
Step 6: Check to make sure you get back your files.
Read more: Signs of Your SSD is Failing