Yes, this is just a fakeemail.
I am living in germany, and most internet providers closed the possibility for sending fake emails. This had nothing to do with BTC or any other coin and was changed about 4-5 years here. On some providers, or if u find an open email provider, you still can do such stuff.
Its pretty easy sending an Email from
bill@microsoft.com or similiar account.
It was good for you, opening that Email Link on your Iphone. Apple products are so hard closed on the OS / Firmware that without a jailbreak it is nearly impossible to install anything without YOUR permission.
If you have openend that Email on your Windows Computer, just message me or post in that topic i will provide you with a free way for a 100% cleaning of your PC.
Darn, my Iphone 4 is jail-broken

I have 2FA on some sites that links to my phone. Should I factory reset my Iphone?
Fortunately, I did not open this on my desktop computer.