Could he track me through his old Apple Watch that I now have?

I’ve known this guy just over 2 weeks. The week before he was already mentioning he wanted to give me his old Apple Watch to use. He was quite persistent on it, considering I never asked for it.
He was waiting for some new straps to come in for me. He set the Watch up for me last night.
I’ve had a couple stalkers in my life, and I am taking into consideration that I may just be paranoid because of my past. He also went online and bought me a charger as well last night since I don’t have one.

When he was setting it up for me, I could see he had to put in his Apple ID and password in. I never did, but my phone did say it is connected to my Apple ID. I guess it must’ve did it automatically when they’re syncing right next to each other.
I did call Apple and we could see that everything is linked to my stuff.

He did mention that he wanted to work for Apple since he’s pretty tech savvy. So he definitely knows Apple products more than I would.

I’m wondering is there anything else I’m missing to check? Is there anyway he can track where I’m going or see my text messages as well?

We’re super into each other, it just seemed a bit too soon (to me) to be given an Apple product to use. They’re quite pricey, I appreciate that he trusts me with it. I just want to be sure.

Could he track me through his old Apple Watch that I now have?
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