Apple’s older 12in MacBook features one 5Gbps Gen 1 USB-C port, while the later Intel MacBook Air (2018 and later) and MacBook Pro (from 2016) boast either two or four 40Gbps Thunderbolt 3 ports.
The industry is transitioning away from Thunderbolt 3 and embracing Thunderbolt 4 ... supplying enough bandwidth via the Thunderbolt port to drive a pair of 4K displays and charge your phone.