That’s common with USB mics especially when the mic doesn’t have a gain/level control, so it’s probably normal… Some “podcast mics” have a built-in analog recording-level control, as do “professional” audio interfaces.
The LAST thing you want is to overload and [u]clip[/u] the analog-to-digital converter built into the microphone, so they keep the gain down to accommodate louder sounds. Turning down the volume in the computer after the signal is digitized won’t fix clipping… The analog signal has to be adjusted before it’s digitized.
The lower level doesn’t hurt quality and you can boost after recording (with the Amplify effect).
Thank you Trebor and DVDdoug. I am very grateful to you both for your answers.
I can see no further mic level controls in Windows 10, so I am reassured by your answers that I just need to work with the lower signal levels and adjust in Audacity after recording.