There is a lively OA scene here in Canada, and the major public research funding bodies (the so-called Tri-Agences, SSHRC etc.) are moving towards a position in which all publicly-funded research must be published under Diamond OA terms.  This applies to articles, not books, at present.  The main OA support organization in Canada is Coalition Publica, which is itself comprised of two organizations, the publishing platform Érudit and the software developers PKP (the people who make the Open Journal System).

I am myself grateful to Coalition Publica because they provide annual funding of about C$3000 to support the journal History of Science in South Asia.

Last week, I attended an online seminar at which the whole Canadian OA landscape was discussed and explained in the context of a newly published response from Coalition Publica to a government policy proposal.  I know it's a bit esoteric, but if you are interested in these things, perhaps to compare with what is happening in your own country, here is a recording of the seminar: