It’s probably like the that for everyone, my guess is that mangago gets a good amount of they’re series (especially their villainess/isekai ones) from M*ngaD*x (which is currently down) paired with what the other reply said about less people uploading.
I noticed that a few series I followed updated while it was down but I didn’t get notifs so I assume it notifs only for the day it updated, however the first time the site was down I got all the update notifs at once on the day it came back (which piled up to about 30~ for the threeish days the first time)
Lol didn’t mean to write this much TLDR: same, I only got 3 today.
I usually get like 15+ updates but now I'm only getting like 2/3....I'm guessing it's cause the site is just back up...but its not just me right?