Feature Request LOD CrossFade Standart Shader in URP

Hello,
I wanted to make some optimizations on my game and i tried LOD Group and it work perfectly, i gained 5-10 FPS.
Just a detail, it's too obvious when the object disapear immediatly when culled, so i read about crossfade effect.
But i haven't found an easy way to do it without replacing all the shaders i use, and even the documentation is not very detailed about how implement it in URP.
I'm new at shader so i prefer to don't write custom shader and replace one by one all my materials with textures already associated.

Is there any way to simply "Upgrade" the standart URP shaders to take in account the crossfade with an alpha blending or something like that ?

And it could be very generous that feature is added to the URP Package.

Thanks for reading.