Recording using Rode NT1 so quiet I can barely hear anything

This is almost certainly the same issue as I had, which is solved now. It seems to be specific to Focusrite interfaces (and possibly Steinberg too), which send stereo signals regardless of if you have 1 mic plugged. The thread for how this eventually got solved is here: https://forum.audacityteam.org/t/input-level-too-low-in-3-1-rode-nt2-a-focusrite-scarlett/64037/1