In 2020, Apple began selling Macs with its own Apple Silicon chips. But outwardly, Macs look like the old ones. How to tell if your Mac is running an Intel or Apple processor Silicon;
Because Apple has made a smooth transition between Intel Macs and M1 chip Macs (Apple Silicon), it is really very difficult to stand out. The MacBook Air 2018 and the MacBook Air 2020 with M1 look the same.
If you see the Apple M1 (or higher) in the "Chip" section, that means that you use a Mac with Apple Silicon CPU.
And it's so easy to know if you're using a Mac with an Apple Silicon CPU or an Intel processor.
Source of information: howtogeek.com