For projects (xers) with external links to other xers, is there s dashboard possible to provide a list of where the current Xer or Xers open have links externally or to each other?

XER Toolkit automatically recreates linked projects, which you will see on the EPS. To see what it linked, click on the paperclip icon in the baseline column.

This will bring a dialog box up that shows all your projects, with a tick next to the linked ones