Stolen phone containing gmail acc

Hi! My other clan member, got his phone stolen and the one who stole it changed the password and recovery number of the gmail. Can he get it back? 😰

Yes if he has a seperate email linked to the account

I'm using moto g2
It has a special authentication and full modification through an mortola account.

I can flash all the data including apps and account remotly incase of missing or stolen.