i don't think akanji's transfer to galatasaray is very likely anymore. fabrizio romano wrote that galatasaray has reached a definitive agreement with manchester city but hasn't spoken to the player. from what we can gather, akanji will choose the club he wants if someone pays his fee.
i don't know where akanji wants to go, but i think galatasaray should sign him. the wilfred singo transfer has been completed, and adding another defender is essential for the champions league. although he doesn't play the same position as akanji, it's also been reported that galatasaray has been in talks with bissouma. he would also enhance the quality of the midfield.
Because there are rumors regarding Crystal Palace and Milan, who are also interested in him. So Galatasaray has competitors for his signature. The deal indeed took place with both clubs, but if the player wants to choose another club that is also willing to pay the same amount as offered by Galatasaray, maybe Akanji will choose it.