App not appearing in ShareSheet fix : Runner & Share Extension minimum App Deployment Target should be same for example if your setting it up Ios 14 then set it for both (Runner & ShareExtension) keep it same also make the MACH-O-TYPE = Executable for both (Runner and ShareExtension) for it to work in IOS without showing that grey bottomsheet opening and closing issue.
Ensure the Runner’s Build Phases are in the following order: