NOP 4.40.3 canonical missing?

Hi!
we received audit of our SEO company and one of errors is "missing canonical".
It's impact on all pages, but fix is needed on list below:
Register
Blog
Blog posts
Contact
Sing in / or order by a guest

Maybe someone fix it?

This is not a bug, by default canonical urls are used for catalog pages and topics (you need to enable
CanonicalUrlsEnabled setting), other pages are left for customization.