Officially, only transparent is currently supported but Ledger Zondax is preparing an app to release at some point. You can follow that here.
Unofficially, yes. The Ywallet app Ledger option has supported Orchard for quite a while. Currently, the option is not exposed in the latest Ywallet version since the last UI overhaul. You could potentially use that version (1.4.3, I believe), but BE ADVISED: if you used any newer wallet version (of the same build type e.g. flatpak, appimage) then there is the possibility (liklihood) of database corruption due to an incompatibility from changes made between the old and new versions. So, if you’re planning on downgrading, be sure to back up everything, double-check that the back-ups work beforehand. Hanh did a number of videos (scroll down the list to see them) I made one as well.
