Need Firmware for Tronsmart S89 Elite with high DPI for old SD TV

[Android 10.0 Windows]

As the title says I need CFW (CFW=Custom Firmware) with the DPI set to 280 have tried many thing to change the DPI but they won't work.
Thank you in advance to whoever helps.

[neoman4426]

I know it's possible on a per app basis using Xposed and the App Settings module, that's what I do personally. There are also apps to set it system wide or you could set the ro.sf.lcd_density property in build.prop, but I haven't tried either of those.