I have installed LR6 on Windows and it works fine. I have also installed the LR mobile version on a Nexus tablet which also works ok. However, I do not see any option on the desktop collections label to turn on sync to mobile for any collection. The icon is supposed to appear on on a collection when I hover.
What am I missing?
Mobile sync is only available in Lightroom CC - you have to be a CC subscriber.
I am a Lightroom CC subscriber.
Found it. I neglected to turn on sync by clicking the arrow next to 'Lightroom' on the top of the page.
Ah, good - when you referenced Lightroom 6 (rather than CC) I feared you weren't a CC subscriber. Glad you got it working.