связка watch se 2020 с iphone se 2016. по совместительству iphone поддерживается, но по факту пишет версия ios устарела. как их связать? очень надо.

Sorry, but those two devices can not be paired, you will need a newer iPhone.

If your Apple Watch is running watchOS 10, your iPhone has to be updated to at least iOS 17.

The iPhone SE 1st Gen. can not be upgraded beyond the latest version of iOS 15.

Apple Watch and iPhone compatibility - Apple Support

Совместимость моделей Apple Watch и iPhone - Служба поддержки Apple (RU)

Which watchOS is installed on your Apple Watch SE 1st Gen?

If already watchOS 10, and it never has been paired to your iPhone 6s, you might not be able pair it.

Did you already try the troubleshooting mentioned in this article?

If you can't pair an Apple Watch with your iPhone - Apple Support

Если не удается создать пару между Apple Watch и iPhone - Служба поддержки Apple (RU)

The iPhone 6s can not be upgraded beyond iOS 15.8 as well.

You will need an iPhone XS or newer to pair to your Apple Watch SE 2nd Gen.