I think my wife spends too much time on her phone
Is spending time on her phone a new thing for her?
She always use to spend some time on phone, but this is becoming an issue
It can be frustrating to have people be on their phones all the time especially when you are trying to talk to them. It would be good to talk to them about how you feel about what they are doing and what they should be doing instead.
Nah, I'm going to suggest a divorce to her.
I don't think this issue sounds that serious. Before jumping into a divorce just try having a conversation with her. Once she's aware of that her phone use is a problem she may work really hard to fix it.