To check to see if Gmail services for your GSuite account are doing too good a job filtering spam and sometimes marking needed emails as spam, follow these steps.
Log into your GSuite Gmail account using your credentials (Contact your admin for that information if
Click on Spam
You can read through theses emails and if you feel any of them are not spam click on the checkbox, and click "Not Spam"
Once its put back into the general inbox, it will be based on the original day it was sent, so just make sure to note the date so you don't lose it in the shuffle.