I found that some folks have been fixing and updating existing addons for local.

In LbF2.1

cd ~/Library/Application\ Support/Local\ by\ Flywheel/addons
git clone https://github.com/artifex404/local-addon-logs.git
cd local-addon-logs
npm update

The npm update line is needed because the source comes without dependencies. I assume that the UI based intallation of addons does this step (but it wasn’t working for me)