Watch app not listing in complication list of watch app in iPhone

We have an IOS app and its watch extension. The watch extension having complications as well created with clockKit

Also we are providing a watch face with our custom complications for the user. Everything working fine watch series 6 and above

Now we have an issue reported by a customer in watch series 3 (the watch Os version in 8.8), in which the watch face is not able to add as it showing the error "Watch Face Unavailable"

So when we tried to create a another watch face for watch series 3, the complication list on the watch extension as well as the watch app of iPhone are not listing our app name

Because of this issue we can't create a custom watch face for the watch series 3 with our complications

So why the watch app in iPhone is not listing our watch app name in the list of complications

Please update if anyone having similar issues

Replies

Guessing, but all the watch faces in watchOS 10 (or maybe 9?) were updated to be compatible with Series 4 and later screen sizes, with graphic rather than simple complications. If you're creating a face from a newer version of watchOS, it is likely incompatible with Series 3.

Actually we tried to create watch face from watch OS 8.8 only from an Apple Watch series 3. So as per your reply , I believe only simple complications will work on the Series 3 rather than graphic ones

So we will try to add some simple family like modular, utilitarian or circular