Malte Ubl on Twitter: “🙏🏿 to @sebabenz for testing that this isn’t an AMP special case. Safari now defaults to sharing the canonical URL 👏🏾
If Safari is updating its “share” functionality to look for canonical URLs, then that should work not just for AMP pages, but also Medium posts that include a canonical URL (like the ones created by posting to the Medium API, which is what I’m doing).