No you can’t. The code was changed years ago to only work if the text in the PRIMARY buffer “sort of looks like it might be a URL”.
That defeats the whole point of the feature. If someone has written “go to example.domain, it’s amazing”, without bothering to make “example.domain” a link anchor, or even prepending “https://”, then there’s no easy way to actually visit the site. Previously, I could just select the text I wanted, middle-click into a browser window, and hey presto. Doesn’t work any more.
It’s powerfulness IS the problem. Some parts of systemd are great. Some are meh! Some really suck. But because it’s monolithic, you can’t take the good bits and replace the bad. You have to take it all or nothing.
That’s the problem. Its architecture is offensively bad.