Other mistake: Towards the end, Chewbacca and Beckett have walked some distance from the landed yacht. They come up a small slope and are faced with Han, waiting for them. But an aerial shot shows that slope is very short and just runs down to a cliff. There's no way they could have got to the base of the slope to walk up it in the first place.
Trivia: In Dryden Vos' meeting room, the golden idol from the opening scene of "Raiders of the Lost Ark" can be seen briefly on one of the tables. So too is Mandalorian body armour, similar to Boba Fett's.
Answer:I was wondering about this, too. C-3PO did not appear in Solo, and I cannot find any Internet reference pertaining to R2-D2 being in it. Curiously, Anthony Daniels, the actor who has played C-3PO in all the other Star Wars movies, makes a cameo appearance in Solo as another character (Chewbacca's friend).
Answer: I was wondering about this, too. C-3PO did not appear in Solo, and I cannot find any Internet reference pertaining to R2-D2 being in it. Curiously, Anthony Daniels, the actor who has played C-3PO in all the other Star Wars movies, makes a cameo appearance in Solo as another character (Chewbacca's friend).
raywest ★