I also use a dynamic connected to an interface. The issue is that there is still a bit of noise from the preamp and analog circuitry when the mic switch is turn

I also use a dynamic connected to an interface. The issue is that there is still a bit of noise from the preamp and analog circuitry when the mic switch is turned off, and the AGC cranks up the gain when it detects that thinking that you're speaking softly. I know in Zoom and Teams there is an option to turn off AGC in-app (think it's called automatically adjust mic volume or something like that). The same issue has plagued cheap camcorders with no manual gain controls for a long time too as they crank up the gain whenever there's silence - making their audio noisy garbage even if the ECMs and pres are adequate.