Right image, but under those each one below would also be wearing large pants covering each side of the subtree.

It can still have issues with potential attacks that would redirect your client to a system outside of the VPN. It would prevent MitM but not complete replacement.

Likely you needed to include the intermediate cert chain. Let’s encrypt sets that up automatically so it’s quite a bit easier to get right.

There is also SMS passive reading using LEO intercept. Hacked police email accounts are used to gain access to carrier systems where they use “imminent threat” no warrant lookups to pull the SMS in real time.

SMS is a terrible form of 2FA, better than none but not by much.

The underutilized post pre increment operator.