Huh. This is great! Might be a NameCheap (my registrar) limitation. The way it's worded in the management page on NameCheap is that DNSSEC is not supported for .ca period. Definitely something I'll look into. Thanks!
Probably. I had to move to baremetal.ca to get DNSSEC support, and even then I had to email the info to their tech support team as the web interface didn't support it
I use Google Domains and it supports DNSSEC on my .ca domains.