Mon, Jan 1, 0001

do framework 13 port expansion cards work with framework 16?

Yes: https://knowledgebase.frame.work/expansion-card-slot-functionality-on-framework-laptop-16-rkUjGm7cn

Is it the same charger?

Probably? https://knowledgebase.frame.work/en_us/what-kind-of-power-adapter-can-i-use-with-my-framework-laptop-HJGYHVqCd