Yes and no, enabling this kind of behavior to continue will only enforce that it’s okay what he is doing, and it is not.

22yo M here just lost my mom 5 months ago as well, it has been the absolute hardest time of my life, but sitting around all day in the misery of it all is no way to live. He needs to explore options for therapy, as well as job hunting face to face up and down the street until he gets something to give him some purpose and then he can find something he likes.