Apple displays two Thunderbolt / USB 4 ports in the consumption grid of the M1 version of Mac. Many people misunderstand that M1 can support Thunderbolt 4 and USB 4, but it is definitely a misunderstanding. It is only Thunderbolt 3 and USB 4. Thunderbolt 3's fastest transfer speed is the same as Thunderbolt 4 at 40Gb/s, but there are many improvements. In the past, there were 4 Thunderbolt 3 ports in the 13-inch x86 version of MacBook Pro, but now there are only 2 in the M1 version.
MacBook Pro 13 M1 version has 2 ports
In addition, the M1 version has integrated WiFi 6 802.11ax, while the x86 version of the MacBook only supports 802.11ac.