Lost network with W11 24H2 install

A little progress. I had included the Lanman Workstation in Gp Pol as a dependency following 'advice' on anther thread here, bur removing that dependency has allowed Network D to remain active, so the W11 laptop now shows in the network BUT still cannot be 'found'

A quick question?!! I recall right from W95 days that it was recommended to deselect the IP6 box in the adapter properties. Is that still necessary?