How to export calendar From iPhone to Mac

Hi J007,

Thanks for contacting Apple Support Communities!

We understand that you have access to some calendar entries on your iPhone that are not available on your Mac.

Do you use a specific account to manage your Calendar on your iPhone or Mac?

You can use iCloud Calendar to keep your calendars updated across your devices as outlined here: Keep your calendars up to date and share them with iCloud - Apple Support

"Access the same calendars on all your devices

When you set up iCloud for Calendar, your calendars are stored in the cloud instead of locally on your device. You can see them on any device that’s set up for iCloud and Calendar, including your iPhone, iPad, iPod touch, Mac, and Windows computer. You can also access your iCloud calendars in a web browser.

Because your calendars are in the cloud, changes you make on one device—like adding an appointment, deleting an event, or updating a meeting—automatically appear on all your devices. You see the most up-to-date version of your calendars, no matter where you access them.

Restore calendars on all your devices

Calendars stored in iCloud are archived automatically. You can use iCloud.com to restore an archived version of your calendars on all your devices if you ever need to."

Although the iPhone doesn't include a feature to export calendar entries, you can import and export calendar events on your Mac as outlined here: Import or export calendars on Mac - Apple Support

We look forward to your reply.

Cheers!