The VAST majority of pen displays up to 60Hz.
Only a handful of pen displays support refresh rates of at least 120Hz.
As of Nov 2024, only a few pen displays support high refresh rates:
Wacom Cintiq Pro 27 (DTH- 271) -> 120Hz
Wacom Cintiq Pro 22 (DTH-172) -> 120Hz
Wacom Cintiq Pro 17 (DTH-227) -> 120Hz
XP-Pen Artist Pro 24 GEN2 165Hz (MD240QH) -> 165Hz
Slightly.
I've tested several of these high-refresh-rate pen displays. Compared to a 60Hz pen display, the pointer lag visually seems improved by maybe 10% to my eyes. This indicates to me that pointer lag is driven by other latencies and rates in the system.