To be clear the US only has a unilingual policy because Trump signed an executive order this year (and I believe even this SCOTUS would strike the order down as unconstitutional if anyone had standing to sue over it).
The US has always been de facto unilingual, but de jure we don't have an official language since Trump has no legal authority to establish that. The "policy" is political and legally empty.
And not anywhere close to what would be tolerable for Canada's francophone population, and especially Quebec which would simply immediately begin separation.
And it's not "soft acceptance of Spanish here and there," all levels of government are legally required to print official documents in whatever languages their community speaks; cities usually have ballots in dozens of languages. This is a constitutional requirement, bolstered by the Voting Rights Act, and Trump has not yet done enough damage to make those legal requirements go away via diktat.
All federally managed things & services, including travel on airlines, airporst etc, fully bilingual. All packaging of goods, across the whole country. Access to legal services, no matter where, bilingual. Highway signs, etc. The list goes on.
Here in Ontario, at least, right to full public school education in French, in the French system, if you come from a Francophone family.
The idea being that even in areas of the country that are not Quebecois or predominantly Francophone there are rights granted because of the French being part of the founding of the nation.
We are not kidding when we say that the American way of life and the Quebec one are incompatible. But this is all moot, the Canadian constitution would require a referendum to decapitate Canada, and that would never get the 50% vote per province that is required. Right now they'd get at most 10%.
Even that is not really true.
The US is de facto unilingual English since its founding. Trump's EO did not change that.