Bit different.
Both Sarr and Saliba were loaned out however the rules state : "A player's period on loan to a club from another National Association will not count towards the calculation of his Home Grown status unless his registration is held in suspension by the League and the FA and he continues to be entitled to be employed in the UK."
Because Saliba is an EU national, he has right to work in the UK. Because Sarr was born and raised in Senegal before moving to France in September 2020, he falls outside of that remit.
Ah ok i didn’t know that part