By relativity, information travels no faster than the speed of light in vacuum. So it's impossible for musicians gathering near each other in person in the same room to play together with no latency.

If conveniently available rehearsal tracks for a 2-part arrangement is in the soprano/alto octaves, but your chorus sings in the tenor/bass octaves, use a stem splitter to isolate the vocals. For the vocals, drop the pitch by an octave & raise formants by, say, 8.5 semitones.

You can do AI voice-instrument stem splitting on your computer without a web/subscription-based tool: ultimatevocalremover.com