When the page is opened in the panel, you cannot change the title by clicking on it.
But you can still change the title (and duplicate the page) when clicking on the settings icon.
This is also possible using the settings menu of a pages-section where this page is displayed in.
So either this is a bug, or the specifications on the following page are incorrect for Kirby 3.4.3:
I cannot reproduce this issue with your settings. All options in the settings menu are greyed out. The only issue I noticed that I get an error with the preview option settings.
That is odd, what other possible settings could be there that this is not working as intended? As I tripple checked (and freshly installed the 3.4.3 version), and it still is behaving this (incorrect) way.
There is no content indeed, but using this as a page-template gives the result in my current setup (so it’s essentially a Minimal Reproducable Example)
Well, your blueprint should at least have a title. Yours starts with a label, so this is not a blueprint I can test. Please check if this blueprint is even used for the page your are testing.
Ok, for some reason the blueprint works, although a title is supposed to be mandatory, according to the documentation.
I found some tab characters between *: and false in your yml file that rendered some of the options invalid. Never use tabs in yaml files, they are not allowed according to the specs and can easily cause errors.
That does the trick indeed. Thought vsCode would recognize invalid (yml) syntax. Turns out it doesn’t, also formatting doesn’t seem to pick up on the tabs.