To play "what-ifs"
Aircraft 1 is ADSB-out equipped and on a 1/2 mile final.
Aircraft 2 is ADSB-out equipped and is cleared for some operation other than low-approach/landing that puts them, even temporarily, on the final approach course (maybe they're cleared to cross the final approach course or an overflight of the airport at a non-conflicting altitude).
Aircraft 3 is a grandfathered J-3 Cub without an electrical system or ADSB using a handheld radio on a 2 mile final.
Aircraft 4 is you, an ADSB-in equipped aircraft out of range and/or below reception of local ADSB TIS-B towers.
So when you say you have 2 on the "fish finder" or ADSB, you're still short an aircraft and one of the 2 you do "see" isn't the one ATC is expecting you to follow. So yeah, echoing what others have said, ADSB-in information is irrelevant to ATC.
I consider your number to land to be FYI, and I don’t bother repeating it. And don’t bother runway number if it’s active runway and I’ve already acknowledged it (“enter right downwind for 10”, etc) and already in the pattern on said runway. Not sure if that’s correct either, but I’ve never been corrected. My home airport has a large school, so traffic on the radio can clog up the frequency.
I only consider my "order" to be important when its being given to me on a downwind and possibly base and I'm expected to continue to fly my pattern until there's enough separation for me to follow the aircraft in front. Once I'm on final, my position in the line-up becomes superfluous as there isn't much I can do to extend and create separation.
The runway number is important and at least my interpretation is that you should always acknowledge it though local customs that dont follow this rule may exist. Local customs are likely to exist when there is only 1 runway (and its reciprocal) to land but when landing at airports with multiple runways, especially multiple active runways, this can be important. This is particularly critical at airports with parallel runways as I've regularly been setup for an approach to one runway and asked to side-step to the parallel runway (e.g. cleared for to enter right downwind to 10R but cleared to land 10L)