A few more notes:
Apple fool network page says that “early” AirPort routers will handle AARP frames correctly.
In attempt to determine specifically which AirPort routers are “early” I checked 68kMLA and could not find any list of AARP compatible routers.
In response to my query I was told ALL AirPORT routers handled AARP , but my request for a packet capture confirmation was not replied to.
So…
Today I brought a newer model AirPort from FB market place and have a saved search to try to locate an early model.
Thinking the test should be easy I then realized I am not at work and my cheap home switch likely does not have port mirroring. I am down like 5 rabbit holes on this project right now but at least I am not recompiling the Lisa os

My Lisa DB25 LocalTalk cable arrived today but oddly it has a male DIN3 so now I have to find a female to female adapter. What burns my butt is I am sure I threw away dozens of these things years ago…. And now I have to rebuy them from eBay.