I'm working with APEX 24.2.3 and have an old plugin that I slightly modified to support using the Link Builder for an IG column of this plugin type.
So, I added an attribute of type Link to Target Page/URL:

This adds the Link Builder in APEX Builder for this IG column:

However, the Link Builder doesn't accept other columns as substitution strings:

I would expect this (a Columns picker):

Manually adding a value (like &ID.) doesn't work. The value of the ID column is not substituted in the generated link.

I think this could be a bug, but it could also be just a limitation of plugins. Does anyone have any idea if the Link Builder can access other column values when using this in a plugin?