How to force Intel Quicksync encoding vs AMD encoding

[MarcParis]

Currently on my host machine, I'm using software encoding. Despite it's working great, for some games, I'm facing some minor lags.
I've tried AMD encoding...and to be honest...it's far from stable and universal. Compared to software encoding, only a few games is working on AMD encoding..:(
I was able to use iGPU encoding before Steam September update (when AMD encoding was put in place)...and it was working great!
Thus I would like to force again intel Quicksync for encoding...but I didn't find how to force intel Quicksync vs AMD. On Nvidia drivers it is simple...and on AMD..I didn't find nothing to force iGPU instead of discrete GPU.

Thank you in advance for your support

Of course : my iGPU is activated.