A:Answer This does not have Gsync or Freesync. What it has is standard VRR, which is part of the HDMI 2.1 specification.
What this means, is that this TV requires a video card that supports HDMI 2.1 in order to do VRR. For Nvidia, this means an RTX 3080 or higher, and for AMD, an RX 6800 or higher.
Anything lower end won't support VRR with this TV. It is possible that lower end cards may be refreshed with HDMI 2.1 support in the future, but no guarantees. And anything below the current gen will never support it.