While a Snapshot is available for this model, I've found it very unstable. Is a current release on the horizon?
The most stable I've found so far is the 21.02.0-rc1 release:
https://firmware-selector.openwrt.org/?version=21.02.0-rc1&target=ath79%2Fgeneric&id=comfast_cf-ew72
How are you flashing the device? If I try through the GUI I get an error: sett failure