Airtag - impossible to set 'lost mode'

Hi Cichy75,

Thanks for coming to Apple Support Communities for help today.

We'd suggest double-checking you have followed these steps: Mark an AirTag or other item as lost in Find My on iPhone.

Be sure and test with both a phone number and email address in Step 3.

"Turn on Lost Mode for an item

To mark an item as lost, you need to turn on Lost Mode.

1. Tap Items at the bottom of the screen, then tap the name of the lost item.
2. Under Lost Mode, tap Enable.
3. Follow the onscreen instructions to enter a phone number where you can be reached. To enter an email address instead, tap “Use an email address.”
4. You can also receive a notification when an updated location for the item is viewable in Find My.
5. Important: Make sure you allow notifications for the Find My app. See Change notification settings on iPhone.
6. Tap Activate."

If the issue continues, we'd advise contacting Get Support for a deeper dive.

Have a fantastic day!