Buy it “TinyPilot Voyager”

or

Build Your Own “pikvm”

I’m not a networking guy and have no idea where to start.

You have several choices, a few to consider:

Mikrotik

UniFi

TP-Link Omada

Knowledge is expensive in time or money.

Trade the one you have most available.

Archer A7 at home and I have no issues with.

So, the common sense part of me says… Don’t fix what isn’t broken and use the A7.

The /r/HomeNetworking side of me says, if you have 6/6e end-user equipment, test the Eero 6e equipment.

Then again… I’d have installed OpenWrt on the A7 already.