Kean will score goals at any club that creates chances.
He's a good penalty box striker, he has always done well at getting free in the box and his finishing is decent enough that he will keep getting goals. The biggest issue was his overall play outside the box, looks to have improved.
His qualities didn't work with our style of sitting deep and creating very few chances in Allegri's second spell. It highlighted his weaknesses and limited his strengths.
I think he would do fine if he got a move to a bigger club but wouldn't think he'd be the main striker long term. His situation at the moment playing for a upper/mid-table side having a good season is perfect for him and like others said he could have a similar career to Immobile.