Can’t download it on the play store
In order for us to provide better support, we need to see the log generated by Citra. This guide will walk you through how you can obtain the log file: How to Upload the Log File.
Download AIDA64 and show the CPU tab.
Minimum requirements are: 64-bit Android 8 or later and OpenGL ES 3.2 support.
If the CPU tab says “32-bit Mode” then that is why. You will need a new phone in that case.