Re: What apps do I need on my Android 10 and my existing Sansui Smart TV and Roku feed 2710?
I'm not sure I understand the question. Perhaps explaining what you're trying to do, and why you feel an Android phone would enter into the mix.
I will add that while the Roku 1 (sometimes branded as the Roku SE) model 2710 is officially supported by Roku, there are many apps that do not support that device.
Oh, and if it's screen mirroring you're after, that device doesn't support it. In fact, the only device from 2013 (that's when the model 2710 was released) is the model 4200 Roku 3. No other Roku that old supports screen mirroring.
DBDukes https://www.dbdukes.com/Roku Ultra (4660) Roku Streambar (9102) Roku Streaming Stick+ (3810)