1. not the first manufacturer, there are other ways how not to use a dedicated physical interface for ICL (peer-link), such as evpn / vpls / xconnect, but apparently this is not related to Cisco.
2. In such a scheme, there is generally no need to use vPC (MLAG), since There is an EVPN MH, but again, this does not apply to Cisco.

Less marketing, more truth.