Hey Jason,
I have a VFD for single-phase 200-240 V input for a 2.2 kW spindle. It is rated 24 A max. input current, and in the manual, the recommended circuit breaker/fuse is 30 A. Here a photo of its nameplate:
You see, the input current rating (Ampères) is there.
Note that I have noticed that cheap chinese VFDs often simply omit the input current rating on the nameplate and in the manual, especially on 120 V models, as they try to hide the fact that for U.S. buyers, there is usually no circuit strong enough in a normal household. On 120 V models, for the same power, the current would be the double than for 240 V.