Not Receiving iCloud Emails

Hi, I haven’t been able to receive iCloud emails for a couple months now. The only emails I receive in my icloud are from Apple directly but I can’t find other emails in any of my other tabs or accounts that I know I should be receiving and am expecting (spam and junk included). My icloud mail is turned On with fetch mail command, I tried Push and Manual as well with no luck. I signed out and signed back in on multiple devices and I also just purchased 2T storage as a last resort and still nothing. Any ideas why this is happening or solutions? This is happening on all my devices.