Apologies - I get these apps mixed up!
TouchOSC is basically a slider control interface, well it's much more than that as it can control LOADS of parameters. But I don't think metering is involved.
There's another app, TouchDAW which is the one I've used. This can emulate a Mackie Control, so I expect the metering will be the same as on the Mackie MCU (i.e. it appears under the track name as a horizontal bar).
I've not tried it with metering enabled though, so I'm not sure whether this does actually work. I'd be surprised if it doesn't though, as the display part of the MCU is basically dumb. It shows whatever your DAW sends it.