There is some smaller midi pedal if you go through the "Show us your FM3 rigs" you will see people using. Its like a strip you put at the foot of your FM3, it has a few options and bluetooth etc if needed.
I have the Morningstar MC8, after wanting one for YEARS. Got it right before the FM3, and to me its been a doorstop.
The app you need to use to me, to me, was exhausting. You need to choose the on and off and all these weird drop downs
to do something so simple. I will probably be selling it soon but holding on hoping it will one day "magically" work with the FM3.
On Morningstars youtube, about 5 months ago they posted a video about the new "Fractal" options which is basically that it just works with the FM3, with little effort, reads it midi, etc. However there has been a lot of back and forth with testers and customers saying its not as easy as they make it out in the video. Morningstar has been trasparent and cool and saying they dont have an FM3 to actually test on but they have a Fractal Axe FX3 or something.
They were great on email support, but bottom line unless you have the inclination for the computer app then... yeah..
In the past I had a Boss ES-8 which is a pedal switcher, but also a midi switcher. It needed no computer or app, but with simple buttons you could program everything you need and it was a great experience. Perfect piece of equipment basically. They make smaller versions, a 3 switch and a 5 switch. Some with "hundreds of Boss pedals" in them which is cool to throw in a switcher.