A leaked run on Geekbench 5 (spotted by APISAK), it appears that Xe HPG, precisely the SKU4 variant with 128 Execution Units (EUs) appears to reach 2.2GHz or 2,200MHz.
This means the Xe HPG part here has scored 13,710 in the OpenCL compute bench. An earlier alleged performance leak (via APISAK), back in June, had suggested that the DG2-128 (SKU4) is performing in the vicinity of a Radeon RX 5500 XT or a GeForce GTX 1650 SUPER. The DG2-128 was clocked at 1.9GHz.
If the earlier leak was accurate, Intel's graphics team are doing well at squeezing more clock speed from the part 2.2GHz is close to a 16 per cent increase.
A few days ago Intel announced it is delaying the launch of the Xe HPG (DG2) until CES 2022 still that gives it more time to improve the clock speed further we guess.