Since we do not have an effective user experience, we have forwarded your question to the Community so that it may be answered by another customer. According to the LG page, 240 Hz is supported.

The two monitors, LG 27GS95QX-B and LG 27GS95QE-B, are very similar, but the LG 27GS95QE-B offers higher brightness in both SDR and HDR modes, making it particularly suitable for well-lit environments. This difference in brightness is the most important aspect of the two models.