I'm probably out of step with others, but this probably won't happen as this is not a very score-like feature.
If you just want to be able to preview what a section sounds like without certain parts playing, select them and temporarily use Notes --> Set As Tacet. Then play and listen. Not a nightmare and no duplicate versions entailed.
If you need to rely on a scoring tool to generate a sampled performance that reuses some material but not all, then making the effort to score the section twice with the desired instrumentation will assure that it consistently does that without asking the common repeat functionality to be hacked.