Does anyone know how The Modern Desk coded the anchors that jump down the page?
The behaviour is awesome: in Apple Mail it jumps, in the browser it jumps, but on mobile it doesn't do anything since there is no support. That's awesome.

I know all about the bad support for anchor IDs, which is why this is intriguing.

I tried to replicate the same behaviour by copying the source code (just as a curiosity), and when I click the anchors in iOS Mail, it switches to Safari.

Here's the e-mail: