Hello! I'm wondering if the Apple watch SE has 5G capability?

All Apple Watches are LTE (aka 4G)

5G chips, at the moment, are far too power hungry.

You don’t need your iPhone with you for the current LTE Apple Watch.

5G is a speed thing. The Apple Watch does not do anything that needs gigabit speeds.

No, it doesn't. Even Apple Watch 7 is LTE and UMTS, so not 5G there either.

KingSasha wrote:

What are the advantages of having 5G capability besides not needing your phone to be with you?

BobHarris answer is perfect.