My mic on my iphone11 is not functioning when I make a call. Voice memo works video it works. I have tried all the tricks on this page, but no luck. Any advice?

Seems you have already followed:

If the microphones on your iPhone aren't working - Apple Support

What I would recommend in addition is to see if there is a difference if you call with facetime audio, or regular cellular.

If issue happens only with cellular I would recommend to call your carrier.

If issue persists on facetime audio, try a clean install.

You can try a clean install of your device after a factory reset:

First make sure you have a backup

How to back up your iPhone, iPad, and iPod touch - Apple Support

Then factory reset your device:

Restore your iPhone, iPad, or iPod to factory settings - Apple Support

And set it up without a backup. See if the issue persists.

If it still does not work it is a hardware issue and will need service:

Contact Apple for support and service - Apple Support

If that solved it there was a software issue. Try restoring the backup and see if it still works.

if that made the problem come back the backup is the problem

Good luck!