Is the 2020 Macbook Air on sale on Amazon the same as the Apple site?

Amazon is an Authorized Apple Reseller and new products that they sell are the same as the product with the same specs purchased directly from Apple. Note that they also sell "renewed" products. Compare the MacBook Air on their site carefully with the Apple online site.

Be sure you ask and know about the two different 13-inch build

models MacBook Air 2020+ series and sales order info available.

One would be an older Intel-based MacBook Air.

Other, is newest tech M1 Silicon SoC MacBook Air.

MacBook Air (M1, 2020)

Colors: Space gray, gold, silver

Model Identifier: MacBookAir10,1

Part Numbers: MGN63xx/A, MGN93xx/A, MGND3xx/A, MGN73xx/A, MGNA3xx/A, MGNE3xx/A

Tech Specs: MacBook Air (M1, 2020)

User Guide: MacBook Air (M1, 2020)

MacBook Air (Retina, 13-inch, 2020)

Colors: Space gray, gold, silver

Model Identifier: MacBookAir9,1

Part Numbers: MVH22xx/A, MVH42xx/A, MVH52xx/A, MWTJ2xx/A, MWTK2xx/A, MWTL2xx/A

Tech Specs: MacBook Air (Retina, 13-inch, 2020)

User Guide: MacBook Air (Retina, 13-inch, 2020)

Model numbers may vary by sales region and hardware packaging.

In addition to the above, please be very careful when purchasing from Amazon. A very large percentage of the products sold on Amazon are not actually being sold by Amazon. If it's being sold by someone else on Amazon, the seller is not an authorized Apple retailer.