I was able to add a zigbee key fob with the help of the community. The first step is to use a sort of generic zigbee device to get the clusters that the device supports like @sidjohn1 mentioned
I created one based on others I found in the community.Use this link and then post the clusters you find
You’ll have to create the new device type in the IDE and then point the “thing” to this new device type. Then go into the st app and press the refresh button on your thing device which should trigger the getclusters