@mike C
Thanks for the options. I am currently using an additional USB audio interface with an XLR mic splitter and it does work. However, the reason I was looking for an alternative from the mixer was so that I can use the Fx on the mixer. I think my best option at this point is to just abandon the use of the Fx on the A&H mixer and just go with an external vocal processor. This way, I can just route via mic.XLR->mic.preamp-processor->mic.vocal-processor->mic.splitter and then AH.mixer->PC1 + audio-interface->PC2 (i.e. Fx applied prior to splitting).
I appreciate all the help from everyone.