Hello!
There is a problem...
If you select any of the 3 signals "All / Any / Each" as an input signal on the display, the display does not display the quantity that is transmitted. To get the number of items, you need to select exactly the signal that initially corresponds, otherwise it shows 0. Please check this point.

Hello,
since those mentioned signals are "special virtual signals", they are not displayed by its own, you wont see them separately by checking the red or green circuits.

The original mod also does not display such signals as well.

The "workaround" at the moment is to use a decider combinator which then can provide a virtual signal with the result.

The only solution would be to add calculations for every iterated signal found on the circuit, which then slows down the game more or less depending how many times such a construct is being used.
The decider combinator included in the game core is much better suited for this job since it is much more efficient.

Hmm...
I probably won't be able to build a similar structure with a decision combinator :(
I receive requests from the platform, and in order to see them visually, I use a display and a combinator that allows you to select a signal from the network with a choice of input index, that is, the first signal from the network, the second from the network, the third from the network, and so on, and they are always dynamic.
Well, I'll try to come up with something else so that I can somehow get around this :(

Maybe this can help somehow?
This mod - https://mods.factorio.com/mod/signal-display, when selecting the signal "any" the number of items is displayed, maybe there is some hint in the code, or is it a big hassle? :)

i will look into it, how they are handling such things, but i will postpone the change to the code for the time being, otherwise i have to maintain 7 copies currently.