I wish they made airtags in different form factors.
I've gotten into photography lately. I'd love to slip an airtag into more places - ideally within the housing of my camera bodies themselves. But, there's not really any room to put an airtag on or in a camera given the current airtag form factor.
You can get camera cages with secret compartments for airtags. And lens caps which take an airtag. But they take up a lot of space, and end up adding a lot of bulk to the camera itself. I wish Apple opened airtags up to 3rd party manufacturers who could buy the (tiny) circuit board directly, so they could hide it in their products better.