General aviation pilot using the Foreflight app reported that when they overlaid an approach chart on the map the NOTAM information did not populate.

Narrative

I was VFR on top direct to ZZZ and needed to divert to MCE because ZZZ fogged in and has no (useful) Instrument approach. I pulled up MCE on Foreflight and sent the ILS to my map; briefed it and got the AWOS. Then I requested the approach on 120.95; Norcal. I was given vectors and cleared for the ILS 30 MCE. My equipment does a GPS overlay of VLOC (VOR/Localizer) approach and I got established while still in GPS mode. It took longer than normal for it to switch to VLOC; which happens; and I finally switched it manually. When I switched it manually; the color changed to green and it obviously had no signal. I was IMC and started setting up to go missed when I saw the ground below me. So I just popped down out of the weather and flew in below the clouds and landed. I thought that my equipment failed me; but figured out that there was a NOTAM that declared the ILS INOP. I know it was my responsibility to see the NOTAM; but I did not. First; it wasn't on the AWOS. Second; and this is interesting; when you open a plate in Foreflight it shows a NOTAM flag at the top of the plate; but if you send the plate directly to overlay the map; it does not show the NOTAM flag. Lastly; I was vectored and cleared onto an approach that was INOP by ATC.