Is it realistic to pursue a PhD in mathematical physics with my background?

Hello everyone!I have a degree in Applied Mathematics and a Master’s in Theoretical Physics (classical physics, mathematical methods in physics, quantum physics, structure of matter and the universe), but I haven’t done my thesis yet.

I’m curious if it’s realistic to aim for a PhD in mathematical physics and which research areas I might have the best shot at. Any advice, personal experiences, or tips would be appreciated!

Thanks in advance!