yes can be done...

I'm assuming your phone don't have tv out type function, otherwise you won't be asking

you'll need a MIPI DSI to HDMI converter... because phone screen uses the mipi dsi signal...you'll need to tap into this signal and send it to the converter... you also need to tap the audio signal...

obviously this means dismantling and hacking your phone. I got a few spare phones so investigated this... problem is long time ago this DSI to HDMI adapter didn't exist...nowadays is available but I no interest liao...

what you asking?

I'm a concept/idea/solve problem kinda guy... can't wait for adapter board, so next idea is convert to projector

at the time I already got a few android boxes and projectors... so the project is just for the sake of doing it... so I lost drive & motivation