apple watch se with cellular

I believe so, but it will also call emergency services first. See the 'Here's how it works' section in:

Use Emergency SOS on your Apple Watch - Apple Support

"After an emergency call ends, your Apple Watch alerts your emergency contacts with a text message, unless you choose to cancel."

It calls the 911 local equivalent first, then it will call secondary emergency contacts

https://support.apple.com/en-us/HT206983

Not that I know of.