[ceefan]

MacBook Air uses Thunderbolt 3, which only requires 1 additional display. Thunderbolt 4, which the MacBook Pro 14/16 has, requires support for connecting at least two additional displays. [0]

[0]: https://www.thunderbolttechnology.net/tech/faq

[jmkni]

Does the M1 14/16" Pro use Thunderbolt 4, or is only the M2 14/16" Pro?

[zamadatix]

They do.