Is it possible your friend added the reverberation after the recording and could send a dry version? People often do because it "sounds better", but then it can hard to handle in the mix, particularly if the reverb characteristics are different between vocal and the instrumentation.

Another name for the reverberation removal process is deconvolution, which may be a search help.
If it really is room reverb, blankets hung across the room and/or around the singer+mic can help.


Jazz relative beginner, starting at a much older age than was helpful.
Kawai MP6, Korg M50, Ui24R, Saffire Pro 40.
AVL:MXE Linux; Windows 11; Win8.1: Scarletts
BIAB2022 UltraPAK, Reaper, a bunch of stuff.