Infinity app install process for watchOS 6

Hi, I delivered iOS + watchOS build for Test Flight with active "Supports Running Without iOS App Installation" checkbox. Then on iPhone with iOS 13 I opened Test Flight and downloaded this build. For iPhone installation was success. But I could not find this build on my paired Apple Watch with watchOS 6. When I opened "Watch" app on my iPhone I saw that iPhone try to install this build for my Apple Watch, but not success.