After the last update of update-manager it now shows a long list of "Ubuntu Pro" updates which I may install after enabling it in the settings.
As I am not in the target customer group for Pro, I would like to disable the display of updates which I cannot install anyway. Can this be done?
I tried the solution provided for a similar question, but it has no effect.
NOTE: following the advice in https://askubuntu.com/a/1454914/367444 indeed gets rid of the advertised updates as I require.
Though my question is about the update-manager not about ESM messages as login, so I am not sure this question counts as a duplicate. It is a different question which happens to have the same answer as this other question. Whether closing as duplicate or leaving it open is better for future searches I don't know.