Technical Battery light issue

[Adamwill]

So my daughter's 2017 Fiat 500x 2.4L alternator went out. I replaced the alternator, serpentine belt, and battery. No battery light is on. I checked all the wiring and replaced fuses. Can anyone offer advice on why battery is still on? Car started right up and runs fine but I know there could be an underlining issue that could get worse later.