The Find My app on the iOS 18.2 developer beta has a new “Share Item Location” option, which gives you a shareable link to the location of the missing item. People can open the link on any device (including non-Apple devices) to try and track it. The link automatically expires after a week or when the item is back with you.
There’s also a “Share Contact Info” option that lets any phone connect with an item and open a website, which will show your phone number and email — if you’ve added those details to the item’s contact page. Seemingly, this is meant to help the person who finds the item contact you.