Erasing a Macbook
Should I also erase the Apple disk image Media Container disk1 if I am trying to get rid of all info on a MacBook to recycle at an Apple store?
MacBook Pro 16″, macOS 12.3
Question marked as
No, that is part of the macOS installer. You just need to erase the Container on your main macOS boot drive.
FYI, here is an Apple article for everything you should do when preparing a Mac for sale or disposal (several steps are indicated to disassociate your AppleID & profiles from the device before actually erasing the device):
What to do before you sell, give away, or trade in your Mac - Apple Support