Legacy system extension

If you open System Information > Software > Extensions might give you more info. You can sort the list by "Obtained from" to separate Apple extensions from third-party.

Developer name alone often does not provide enough information.

How many third party kernel extensions do you have installed? You should assume all of them will need to be updated to run in the next major macOS.

There are about 10 non-Apple extensions that are installed by Apple.

Copy/Paste this command into Terminal and hit return.

kextstat | grep -v com.apple

That will list all non-Apple, loaded kexts.

I thought those kexts were all in /System/Library/Extensions, but either I don't remember correctly or they moved them outside of /System.