A while ago I installed GrapheneOS on my Pixel 4a but left the bootloader unlocked. I was using it for a while but having the bootloader unlocked kept bugging me so today I finally decided to lock. I just quickly checked the documentation for the command but unfortunately didn't read the line about the command fastbook flashing lock doing a complete wipe of the system. Now the data of my phone is gone without a recent backup.
Is there any way of restoring at least some user data from before the flash?