Electro-Voice RE20 through a Warm Audio WA73 preamp
Yes. With the WA73 Single-Channel Preamp already in line, the Scarlett Solo 4th Gen only has to supply about 0 dB of the 57 it publishes. Published specs.
The hard gain is already done. The Warm Audio WA73 Single-Channel Preamp sits in front of the Focusrite Scarlett Solo 4th Gen, so the interface preamp is no longer the thing that has to rescue a quiet microphone.
Electro-Voice rates the RE20 at -56.5 dBV/Pa, the voltage from a loud 94 dB tone at the grille. A speaking voice is closer to 85 dB, so the preamp still has to find about 0 dB to land near −9 dBV. That −9 dBV figure is just a tracking level: high enough to use, with space before the converter clips.
Feed the interface from the booster's output and do not stack a second microphone preamp on top. Most inline boosters spend the 48 V themselves. That is fine for a dynamic. If this microphone is a condenser, read the booster's manual before you leave it in the chain: if it does not pass phantom, the capsule goes silent.