Let’s get a number on that.
Run the Audiobook Mastering Macro to get your levels set.
Then ACX Check to get the noise level.
Most “home studios” don’t pass without some noise reduction but you should be able to get “close” to the -60dB spec.
What happens when you unplug the microphone? Condenser mics have a built-in “head amp” (1) but usually they are better than the preamp. That shouldn’t be the problem. But maybe your mic has a defect. (It’s not a high-end mic but it’s also not the cheap junk they sell on Amazon… It should be OK.)
Or it may be acoustic noise. If you don’t have a soundproof studio, room noise usually dominates. Maybe stuff the mic under a pillow and if the hiss gets muffled, it’s room noise. Noise always sounds worse on a recording than “live”.
A lot of people record audiobooks with these Focusrite interfaces, but there is also some chance that it’s defective.
(1) Dynamic mics don’t have any internal active electronics so they don’t generate noise but the output is 20-30dB lower and you usually end-up with a WORSE signal-to-noise ratio. And a lot of people end-up using a Cloudlifter to boost the signal.
There is a MYTH that dynamic mics pick-up less room noise but they also pick-up less signal so after amplifying, you’re back to where you started, or worse.