Ok, let’s see if I can finish this one.
Now I’m inclined to use the Excerpt metabox.
I have deactivated the PHP to hide the 3 dots, and Customizer / Blog is set to show Excerpt.
If I leave the Excerpt metabox empty, the 3 dots and Read more label are there, but when I copy/paste or write the excerpt in the metabox, the 3 dots and Read more label disappear
I suppose that’s the way WP is intended to work?
Can I add some kind of Read more label to the excerpt metabox?
I have read something with PHP but haven’t been skilled to fulfill it