@nfzeta
When he's explaining the shifts he is.
Or Shizuku only absorbed his personality traits and recent memories not long term memories. Which explains how she can make the pizza bread but still needs explainations of the cars and such.
Without seeing the raws or the original novel it can be any number of reasons.
Alternatively, the artist needed to fill some pages and instead of cutting straight to the restaurant he makes the MC do an exposition walk.