The power button has stopped working on my Razer phone

Hi, I have the first generation Razer phone (the one that came out in 2017) Been having some problems with the power button sometimes it'd instant lock the phone sometimes it wouldn't register me holding the button down when i all i want to do is restart the phone.

But about a day or two ago. The button stopped working completely. It still clicks and everything I haven't dropped the phone. I was at Uni it was working like normal got to my lunch break and it just stopped. It hasn't starting working since.

I got the screen to display by plugging it in then downloaded an app to display / lock the screen when i take it in and out my pocket.

Its just occurred to me though, when the phone dies i'll have no way of turning it back on?

Its weird because the finger scanner still works absolutely fine.
I've had the phone almost 2 years, never dropped it or mistreated it once.