New apple watch not working - charging crack?

I everyone,

At Christmas, our employer gave gift and one of them was an apple watch 6. The employé who won it, kept it to give as a gift later.

Unfortunately, it's not working, it's now too late to return and apple was asking 400$ to send for repair. (Rip off), so at work they were like never mind.

I took it to see if I can repair and then give back as a gift for one of my employee if possible.

The watch doesn't turn on at all.

I let it on charge for over a day without success. Unfortunately, I don't have other cable to testthat component but I have wireless phone charger. May be?

I suspect the battery is dead but does that make sense?

I also see a tiny crack where the charging and sensors are. Could that be the issue?

What do you think? I am uploading a picture, it's difficult because of the reflection.