Apple Health Sleep Vital Signs with Garmin Watch

In the latest Update to IOS 26 I noticed, as Garmin had it before, the Sleep score. When I click on it I can see a new tab called vital signs. This seems to only work with Appel watch, since other than normal in health you can't choose the source from where the data comes. This is quite weird, since all the data I need for it is supposed to be imported from Garmin. Now my question: is that just apple keeping the functions to themselves so you "have to" buy an Apple Watch or can I use this function with a Garmin watch and Garmin Connect?