Oh, I misunderstood. So for Transport belts, you would want to add four icons to the mini-recipe which represent "Assembling machine 1", "Assembling machine 2", "Assembling machine 3" and "Foundry"?
I'm definitely not going to add anything which would make mini-recipes longer. I'll consider amending the tooltips.
In development, I was aware that both Helmod and Factory Planner have a feature which allows you to create a blueprint of the Assembling machine with the "Transport belt" recipe in it. The trade-off is that you need to tell those mods which machine you want to use beforehand, or set it as the default for that recipe category. If you don't do that, I have no real way of knowing which machine is "correct".
That kind of advanced configuration is out of scope for Compact Recipe Pins (and way beyond my skill level). You'll just have to open up Factoriopedia and make a pin of the machine.