facetime from iphone to mac

Yes and Yes you have to enable Handoff...

Use Continuity to connect your Mac, iPhone, iPad, iPod touch, and Apple Watch - Apple Support

Use Handoff to continue a task on your other devices - Apple Support

Here's how to turn on Handoff on your devices:

• On your Mac: Choose Apple () menu > System Preferences, then click General. Select "Allow Handoff between this Mac and your iCloud devices."
• On your iPhone, iPad, or iPod touch: Go to Settings > General > Handoff, then turn on Handoff.
• On your Apple Watch: In the Apple Watch app on your iPhone, tap General and turn on Enable Handoff.

You are welcome if I find out anything I will let you know, I am not in the States either.

Did you have Bluetooth turned on ? You should...

Well I have done it and I am using MacBook Pro (Retina, 15-inch, Late 2013) with Mojave and an iPhone SE, so I don't know what to tell you.

I know it the Continuity link I sent you it does not show FaceTime but when I first tried it without Handoff it did not work, as soon as I enabled Handoff it worked.