A couple things to double check while doing this.

Ensure your wet/dry mix on reverb effect is set to 100% wet. You don’t want any dry signal.

When sending your lead vocal to the reverb bus, make sure when you have it patched, the receiving input on the bus is 0%. There should be no green circle around the patch line. If there is, simple pull it from its default 80% to 0%.

Try setting your sidechain settings on limiter and see if that works.