Wallet and Pay and Reminders disappeared after re-pairing Apple Watch with watchOS 6.1

I have *Apple Watch 2 Series* and *iPhone 6S*. Recently I've got an update to *IOS 13* on iPhone and *watchOS 6.1* on Apple Watch. After upgrade **Reminders** stopped syncing. I tried to resolve the problem by unpairing the watch and pairing it again using backup to restore. Now strange thing has happened: **Wallet & Pay** option *disappeared* from Apps list in *Watch* application. So I cannot add any cards to my watch anymore. **Reminders** app also disappeared from the watch. I tried to uninstall the iPhone app Reminders and install it again, but it didn't have any effect on the watch. To resolve problem with the **Wallet & Pay** on Apple Watch I tried to change regions on both iPhone and Apple Watch - no luck. iPhone have Apple Pay app and is able to manage cards. Any ideas what I can try else to recover function of **Wallet & Pay** app and **Reminders**? This is different from similar question, where OP could solve his problem by setting correct region for his watch. I already have region set to the country, which participates in Apple Pay programm. **Update 1:** The Wallet & Pay menu has reappeared in Watch App after I *unpaired* and *paired* the watch as a **new device** (not using backup to restore). Reminders and a bunch of other very useful apps is still not available on the watch. The problem becomes more clear: **iPhone cannot install any app on the watch**. In the watch management app on the iPhone it is visible that iPhone tries to start the installation - rotating circle, but nothing happens for many hours. **Update 2:** Resetting network settings on iPhone and joining again to Wifi seems to restore synchronization between iPhone and the watch: apps now can be installed, calendar get updates. **Reminder** app is still not available on the watch. Tried re-installing app on the phone: no luck.