Yes; the interfaces are pretty much the same as on Librem 5 - the differences are in WiFi/BT firmware blob loading and the fact that L5 has them on replaceable

Yes; the interfaces are pretty much the same as on Librem 5 - the differences are in WiFi/BT firmware blob loading and the fact that L5 has them on replaceable M.2 cards, while on PinePhone they're soldered to the board. Librem 5 also has a separate GPS module, while PinePhone uses the one integrated to the GSM modem. (PinePhone BraveHeart edition also has some sensors connected via the modem, but AFAIK that's going to change in later revisions)