Is it possible to upload watch only app over App Store ? If yes then what is the procedure? Also I'm not able to create watch only ipa for TestFlight. Thanks

We're trying to achieve the scenario where we would like to read NFC Tag (ISO 7816 - Type 4) from NFC enabled h/w device in the background. With the help of NFC bg tag reading this link we tried to read the tag in background. But we didn't receive any notification when we try to touch NFC tag to the iPhone device. This might be because of apple supporting universal links only. We would like to know if there is any way to read the tags in the background which are not using the universal links. Would there be any support for background tag reading in near future? Any information regarding the same would be appreciable.