That is awesome, nice work.

I read up until the part where it’s using unity HDRP. I haven’t found a way to make that perform remotely well on any hardware they should have just stuck with URP or legacy. The only thing HDRP even gives you on top is volumetric lighting and you’d be better off writing your own or using an asset with how poorly HDRP performs.

if you are bad at technology (like me) there’s an app called beeper which does this for you. I’m sure it comes with some caveats, though.