Milan kicked the tires on several options to find a high-profile striker last summer, including Mateo Retegui, who indeed transferred.

Milan Moved for Italy Star, Manchester United Keen

Milan kicked the tires on several options to find a high-profile striker last summer, including Mateo Retegui, who indeed left Atalanta, but to head to Al-Qadsiah. Instead, the Rossoneri settled for Christopher Nkunku, who isn’t a pure no.9.
The future of Moise Kean has been the subject of constant speculation because of his €52M release clause, but the deadline passed.

Kean Quiets the Buzz About His Possible Fiorentina Exit

The future of Moise Kean has been the subject of constant speculation because of his €52M release clause. The deadline to activate was July 15th. While a pair of Saudi teams might have pulled the trigger, he shut the door at that destination. He implied he's staying.
There wasn’t much momentum about Ismael Bennacer transferring to Saudi Arabia, and, in fact, things didn’t change on their deadline day.

Milan to Reinstate Bennacer, Rabiot Turns Down Offer

There wasn’t much momentum about Ismael Bennacer transferring to Saudi Arabia, and, in fact, things didn’t change on their deadline day. He hasn’t received interest from Turkey, where the market ends in ten days. He’s fully expected to stay.