Use the printer’s IP in a browser and add “:4408” as the port, e.g. 192.168.178.114:4408
This will connect to fluidd. Click on the “Tune” icon on the left. This will show the mesh.
…and yes my skills using nmap to scan the ports needs improvement
Another possible issue with this macro: If left front level is too wrong it tends to update all other screws but at some point one of the screws my run out of calibration range and then you need to do a manual re-leveling like described in this video: https://www.youtube.com/watch?v=qKrKXGRXfWs.
I find the outcome of this procedure a bit better and in most cases faster because I need mainly only 2 iterations.
Be sure if you do this that the bed is freshly adjusted on the bottom and nothing was in the print room when it does this calibration before first z-home after printer bootup with bed at bottom of printer!