looking for anyone that has tried or is using in-ear-monitors and a parametric or graphic eq for music performance (musician)

Hi, I am looking for anyone that is using or has tried using a set up consisting of a hardware parametric or graphic equaliser and a pair of IEM, instead of their HA + streaming dongle.
Please, I am not looking for HA brand advice. I wear Phonak P90 and currently use the streaming dongle for listening to my electronic drum kit and sequencer, the sound quality is excellent and ZERO noticeable latency. I believe the P90/streaming dongle, even though giving excellent results are not built for the rigours of a live performance setting. I am aware of a product on the market of which includes excellent IEM and an app with a level of eq processing for the purpose of which I mention (musicians), but the cost for me is prohibitive (IVO $1500+ aud), which brings me to looking at the simple configuration of an equaliser of some sort and IEM (IVO under $500 aud). I don’t want to be wearing over the ear headphones on stage.