Who knows but GrapeheneOS success with Motorola can encourage other OEM’s to want to work with them.

As for why not maybe Nokia/ Ericsson people aren’t aware of it somehow or not focused on how good it is as an alternative

Definitely would love to see what Nokia does with GrapheneOS. Also, never heard of Ericsson till now what do they specialize in/what do people like about them?

Please and thanks