I have succesfully used a cheap tuya meter from aliexpress (white box with two clamps and two wires for voltage). With the official tuya integration you can monitor one device (or whole hose) but if you are willing to jump through some hoops and using local tuya you can get both measurements separetly. I also have a cheap aliexpress DIN style tuya smart breaker that works fine with tuya integration. And finally I have used a tplink kasa smart plug hs110 for 240V measuring (it is advertised for 120V in north america and it has 120V outlet. All of this in 240Vac 60Hz.

Accuracy for monitoring purposes is fine.