I've pinned few websites on my windows laptop and I've recently signed in Firefox on my iPhone. I've noticed that even after synchronisation it doesn't sync the pinned tabs and instead of them it shows top sites by deafult. I do have the options for sync checked in the settings. I tried looking at the advanced preferences to see wheter there was a mistake, but it should be on (see attached).

FIrefox version is 71.0 on my laptop.