Sarr and kulu have played in the derby game too
Not in last season's
away derby -- Sarr was an unused sub and I think Kulu was injured:
Arsenal 3-1 Spurs 1st Oct 2022
Lloris
Romero
Dier
Lenglet
Royal
Hojbjerg
Bentancur
Perisic
Richarlison
Son
Kane
Subs used: Doherty, Skipp, Sanchez, Sessegnon,
Bissouma
Subs not used: Gil, Forster, Spence, Sarr
Arsenal 2-2 Spurs 24th Sep 2023
Vicario
Porro
Romero
van de Ven
Udogie
Sarr
Bissouma
Kulusevski
Maddison
Johnson
Son
Subs used: Solomon,
Hojbjerg,
Richarlison
Subs not used: Skipp, Royal, Dier, Forster, Davies, Veliz
While Sarr, Skippy, Royal and Forster featured in the squad for one or both matches, they only made it on to the pitch in one of them.
EDIT: But even if you do include Royal, Sarr and Kulu as players who are very much still involved, it's still an impressive bit of squad replacement. Compared to the gradual evolution (/slow decline) of Poch's 1st XI, it's pretty frightening.