Am I understanding that this plugin is responsible for this user configuration item:

and that that configuration item defines which interface I am taken to when I click on a URL such as https://jenkins.example.com/job/example/job/example/job/PR-73/6/display/redirect.

If I am on the right track here, this ticket is report that my choice above of Blue Ocean is not being honoured and when I click such a link as above, I am still being taken to the new Graph View interface.

While I understand that the Graph View is the future and that B/O is deprecated, the former is very quite lacking compared to the latter.  It's not really ready yet to replace B/O for a whole raft of reasons.