Hi Sharbotcom. In addition to my MKZ, I have been in many other Lincolns, including 2020, 2021 and 2022 Corsairs, and the temperature could be changed/set using SYNC voice controls.
If you cannot use SYNC 3 voice controls to change/set the cabin temperature in your 2022 Corsair, there is something wrong with your SYNC system and it may be a good idea to have it checked, or perhaps you are using an incorrect command. SYNC 3 voice commands are far more specific/restrictive than SYNC 4 , Siri, Alexa etc.
Of course, it is possible those particular voice commands were eliminated in a newer or the newest SYNC 3.4 update...? That I can not verify or deny.
Let us know how you make out and good luck.