Using a 4-Scale HI 3030, can I see individual load cell MV readings with IT?

Yes. The HI 3030 can support up to 4 different scales, and each scale can have the Integrated Technician (IT) summing junction card supporting IT functionality for up to 4 load cells. The IT summing card will allow you to read the millivolt reading of each individual load cell on that channel from the front screen.
The attached document explains how to run and then read the IT information through the command interface and mapping.