Good spot. For some reason PcPartPicker (my usual tool for this kind of thing) doesn't list the M32U.In terms of 32in 4k high refresh monitors, the Gigabyte M32U seems to be in stock at Currys right now at £699. Both Scan and OC seem to be awaiting stock right but the've had numerous tranches since September.
By contrast, I've seen little or no stock of the Asus ROG PG32UQ at £850 anywhere in UK. The MSI Optix MPG321UR again is also scarce to non-existent.