https://f.toi.sh/fr-ca-mbp.jpg (Pardon the dust!! You never really look too closely as your keyboard until you have to take a picture of it eh?)
Tab, capslock, shift, backspace, and return are all symbols-only. I feel like I have a pretty good ambient understanding of what they mean at a glance so I think I've always seen them on fr-CA layouts I've used.
Was trying to communicate to a designer in Ontario a while ago that we could use the backspace symbol for a correction key in a PIN entry view. We were working on an iOS application so I was immediately thinking that the apple default UI font would have exactly that "chevron with a cross" symbol styled how it looks on the keyboard somewhere in it. Designer was pretty confused about it though, so I think it's probably just fr-CA keyboards.