When a website has a tel: link (example here), this should be click-able within Orion and it redirects to the phone app with the phone number inserted.
Currently, when the link is clicked, Orion responds with
Oh no! Site can not be opened
Orion can't open the page tel:+18008777195
See screenshot attached.
There are probably various phone apps that one might want to choose from (native, whatsapp, viber, etc.), so a choice could also be an option, but I think starting with native would be useful.