The main issue is that you made the changes in the actual page rather than in the master page(s). This is indicated by red triangles. Edit always the master pages by double-clicking one of the pages in the Page Templates section.
Right-click on one of the pages on the right side in the Pages section and select “Remove all Page Overrides”
To show the lyricist in the second flow double-click the First master page and insert {@flowlyricist@} in the frame left to the composer. Copy to the other page and click Apply and Close.
To get composer and lyricist in all flows goto Layout Options > Page Setup > Flows and choose “Any Flow starting at top of page” in Use 'First" page template
Got it, thanks a lot for the help. I had misunderstood the description of the red triangles as being something I would see on the score pages themselves in engraver mode.
For any other newbies reading this, should also add a note here again that “master page” = “template”.
OK, thanks – so I should edit the Flow Header template, but not set “Use ‘First’ page template” to “Any Flow starting at top of page”, then? (And to be clear, when you say “Header”, it’s the same as “Heading”?)
I think of Flow Heading as something that appears at the start of the music for a new flow. I think of a Flow Header as the running header at the top of each page when it includes the name of the current flow.
EDIT: I had these terms reversed originally and have swapped them after @Mark_Johnson confirmed my fear that I had them backwards.
Yes, that’s backwards … ‘header’ and ‘footer’ are running heads at the top/bottom of pages, and ‘Flow Heading’ is the separate item shown at the top of a flow.
Just went down this rabbit hole, was convinced I was doing something wrong when every change in a “custom” flow heading changed the “default” flow heading, only to find out that this is a “feature”. One that people have been complaining about for years now. So within Dorico’s “design-it-blindfolded” template system, I also have to create each new template from scratch?
