I ordered this one on Amazon. It doesn’t work. It holds just fine, but the metal edges block the signal and you have to take it out each time.
had to go back to the plastic one it came in. [4 Pack] Premium Metal Case with Key Ring Compatible for AirTags, Rhinestone Bling Frame Drop Protection Shock-Absorbing Anti-Scratch Protective Cover Keychain https://a.co/d/6YBIMWc