Sorry but your reply is not so clear to me.... I'm not speaking of Uno and Ultimo but newer 4K version of these 2 decoders. So, DVB-S2X is surely not available in old version. But also in newer one, drivers are not enough to get DVB-S2X signal, and a totally new chipset is needed! I believe that manufacturer must redesign the entire tuner for such upgrade.
there is a new mux on 33,1E that uses DVB S2X, you can test it. If it get the channels work, if not don't.
It's a french mux that came from 9E.
Frequency is 12621v S2x 8psk fec 10058 SR 25/36