Thank you for confirmingYes, you can have Switched FCUs outside zone 2.
(and unswitched ones in zone 2 although I know that would defeat your object)
Also, there are no zones created by a basin.
Great point about the basin, my mirror came with instructions that indicated 60cm diameter from the basin tap as zone 3 but I didn’t think this was aligned with regs. Then watched a YouTube from JW (excellent videos) who explained that this confusion came form lighting industry advisories related to IP ratings near the sink and somehow the idea of zone 3 for basins stuck. I think that’s the history. Thank you for confirming !