Ghidra has Z80 support (based on the installation on my laptop), but I've never used it.

An Emu86.assembler.virtual_machine.Z8Machine (like MIPSMachine, RISCVMachine, and IntelMachine) could be stepped through in a notebook: https://news.ycombinator.com/item?id=41576922

Ended up answering my own question. The Z88-DK[0] seems to be what I found. It supports most Rabbit processors, so I ran one of binaries through it and it spat out assembly my way which seems to make sense. Will have to run it through the simulator and see if I can get it to act like a microcontroller with setting voltage levels on particular pins.

[0] https://github.com/z88dk/z88dk