Hey.

I can't get my ESC beeping to work.

If I start 'Find my drone' I can start the flashing lights, but the ESC beep is deactivated.

Is the Mavic able to beep or just the Phantom?
Is there a way in the settings to deactivate/activate it?

Hi fella.  If the Mavic is connected to the Remote, you should be able to actuvate the beeping too. I can on my Mavic; is the option actually greyed out on yours?

Linked it to my controller and app.
Greyed out, yes.

Same here!

I've asked the support.
Let's see.

'Hello,

I am sorry to hear about this problem. Please ensure you have the latest FW and App versions. Also ensure you have a compatible mobile device. You will also have to have the drone turned on for this to work.

Best Regards,
Technical Support
DJI GmbH'

Ok.
Got me a new iPad now.
Works now!
So check another device!