If you could find a diode that both a PWM input and a TTL enable pin (on/off) then it would work in the same way as a standard CO2 power supply, and you could support both in a single job.
Ruida controllers, in CO2 mode, ramp the power up before the cut starts, and then fire by enabling the TTL pin (the L-On output from the controller). That pin isn’t used for RF excited tubes, and a lot of diode setups just have a single PWM or analog pin, and don’t have an enable as well, but some do.