https://www.ycombinator.com/companies/pax-historia

you may be interested in https://www.paxhistoria.co/

The only mental gymnastics required are those to make this about "recent events"

This is extremely misleading. YC still backs Canadian founders (and other international founders). There must have been one too many painful experiences investing in companies based in Canada. Creating or converting to a US-based entity is a standard ask for most international founders who want to participate YC and I suppose something has changed such that Canada is no longer an exception to that.