Any possible hearing aid locating app wouldn’t do any more than a generic bluetooth locator app which you can get on the app store. The app gives you signal strength for the device you’e interested in and it goes up or down as you move closer/further way. It’s a blunt instrument at best. The Oticon app in my Android phone had a hearing aid location feature and it was pretty useless.
The find feature on Apple Airpod Pro 2 works pretty well, even on an older Apple phone. It may make use of hooks specific to Apple. The Kirkland aids wouldn’t have that advantage.
Edit: Your other option is to stream music at full volume to the aids and enlist the help of someone with good hearing to listen out for them. Works best of all if such a person is available.