Why won’t my Apple Watch connect? Why won’t my Apple Watch connect? providing details like steps to reproduce the issue,affected divice and suftware willhelp community

As Apple users, like yourself, we'd like to help. We have very little info. from you to go on, and do not know what you have already tried without success.

Eg: Not connecting: It may be a compatibility issue, or it may not.

We do not know which model Watch or which Watch OS version is installed.

and

We do not know which iPhone model, or which iOS version is installed.

Eg: watchOS 10 requires iPhone XS, iPhone XR or later with iOS 17

and Apple Watch Series 4 or later or Apple Warch SE

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Has the watch been paired with the iPhone before ?

or

is this a new iPhone to a Watch that was previously paired with a different iPhone?

(If so: See How to pair your Apple Watch with a new iPhone - Apple Support )

Does the watch need updating in order to pair?: see: Update your Apple Watch - Apple Support

Watch Support website:

Apple Watch - Official Apple Support