Over 50 brands worldwide offer products that are compatible with HomeKit and your Apple devices — with more and more on the way.
Provided % of Device Requests Where Data Provided Asia Pacific Australia 827 1,416 482 58% China mainland 1,047 11,372 975 93% Hong Kong 14 20 2 14% Japan 1...
https://www.apple.com/legal/transparency/pdf/requests-2020-H2-en.pdf