Can my trade in be taken at the Apple store?

Yes. I have done it twice in the past two years.

Take a look at this.

Apple Trade In - Apple

This is copied from the website.

Just mail it out, or bring it in.

Return it to us using the prepaid trade-in kit we send you. Or trade in at an Apple Store. 

Find a store near you

Hello ~ I believe you can but I would check with Apple to find out for sure due to any restrictions in place perhaps due to Covid. Take a look here:

Contact Apple for support and service

~Katana-San~