@zossebart
In the above example, I see that what is intended is displayed quite well. Something you have is different from mine, somewhere a mistake.
Maybe you don't think there's enough contrast in the dark gray stroke with blue dots?
I have OAM downloaded today, Tiramisu from Github, Velo layer selected, it also has "Cycling networks, Easy Tracks", among other things.
And yes! Thanks, I saw that the rendertheme lacks man_made=groyne. Will be added soon.