Is it legally one lake with two names, or two lakes with one name?
What should customers in neither country see displayed? What if the federal government renames New Mexico to New America, but the state government refuses?
The English channel / the sleeve (france)
The Baltic sea / East Sea (Germany) / west sea (estonia)
Rivers, mountain ranges, etc.
So for these companies to label a lake different things in different countries is trivial and business as usual.
Likewise geopolitical tensions, renaming, borders moving, etc all have precedent.
So while the actual renaming of this lake is novel from a geopolitical standpoint (Canada and US relations) it isn't novel for Google or Apple to make a change like this.
People want to be angry about this even if really doesn't matter, so they get into hysterics about how "is it really two lakes with one name" brain rot.
Do you think South Korea calls the Sea of Japan that?
I think there's some question as to whether the President can just rename things with an EO - what's the legal name of that lake right now from a US standpoint - there isn't a 100% answer for that.