In that case i can only suggest, that you contact both Ableton and Arturia directly thru your accounts.
I don't use Ableton. I have a Live lite 8 version installed on a laptop, and Synclavier V is being recognized and can be used in that - it look like.
Perhaps something has changed in Live 10.
Have you tried both VST 2 and VST 3? That info might be good to pass on to the supports with other technical informations.