Do not assume there is a native app.
App availability and platform rules change. This site does not advertise an unverified native Maxtv23 Roku application. Tell support your exact Roku model and the viewing route you intend to use before purchasing.
Casting is a separate question.
A phone may support screen mirroring or casting, but that does not mean every video source or player will work on the receiving device. Picture, audio, controls and connection allowances still need to be tested.
Consider confirmed hardware paths.
If your current device is unsuitable, review supported Fire TV, Android TV, Smart TV or Apple paths before buying anything new. The goal is a verified setup for your home, not a promise that all devices behave the same.