Sure they can, you can buy a CCS adapter. You are limited a bit by 400V, but honestly I have never been able to not find a Tesla charger - and I’ve done 100k miles around the US over the last 5 years

Plug & Charge, referring to the ability to Plug in and automatically process payment, is what I am referring to.

Tesla cannot Plug & Charge on any non-Tesla network. Whereas other vehicles can Plug & Charge on Tesla networks. Therefor, the advantage is to everyone else.

Teslas have poor charging curves and are not cutting edge for charging performance. They are average.