May I ask what the reason is? If it is a limitation of Apple Home, is there any solution. By the way, my Matter device is still being tested, so it has not passed CSA's Matter certification and Apple HomeKit certification. Could this be the reason?

I think you misunderstood me. I am a developer who has developed my own Matter switch and lighting fixtures, and I am currently using Apple Home to test them. I encountered the problem mentioned above and asked the manufacturer of the chip I am using: Silicon Labs， Their response to me was' related to the limit of Apple Home ', so I came here to inquire.