Do you have a link to:
It’s all on the Canadian immigration website and pretty easy to do
? The current info I have says to apply using the old forms requiring first-generation Canadian parent, wait for your rejection, and hope for an invitation at the discretion of IRCC to request discretionary grant of citizenship based on descent.
No forms for this new process appear to exist and I’m not bloody likely to achieve a certified long form birth certificate for my great grandmother born in the 1800s so it leaves me feeling pretty uncertain about what documentation exactly is or isn’t good enough.