
So glad to hear that :)
That's thanks to @tony37 's workaround.
I hope @Lilium23 , too comes with good news :)
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Before I forget: When everything's fine after you customize it according to your taste, remember to run MX Snapshot from Menu and create your own iso. No matter it's MX 18 / 19 / 21 .. at least you'll have an MX system ready with Nvidia.. On live session, to install back etc..
Also note : to boot on live session you need to type xorg=nvidia in boot options. If you like you can make it permanent but this time you'll need to do the reverse (delete that) to boot on another -especially non-nvidia- pc .