Iphone Mac Calendar Sync. Log into ‘icloud’ on your iphone. Add google account to the calendar app;

Move to settings > tap on your apple id > tap icloud. On iphone, apple offers a voice isolation feature for use during cellular calls.
Resend A Shared Calendar Invitation.
Select “icloud” from the sidebar.
Subscribe To Google Calendars Account On Apple.
Also, my 2013 macbook pro quit syncing the calendar with the phones about 9 months ago for reasons i don’t understand.
You Can Sync Calendar Apps Through Software Or Cloud Systems So That The Same Events, Details And Alerts Appear On Both Your Mac And Iphone.
Images References :
On Apple Vision Pro, Tap Settings ≫ Apps ≫ Mail ≫ Accounts.
Find “calendars” in the list of apps using icloud, and check.
Add Google Account To The Calendar App;
Access the same calendars on all your devices.
In The Calendar App On Your Mac, Place The Pointer Over The Calendar’s Name In The Calendar List, Then Click The Share Calendar Button.