“Prove your statement!”
It was covered by the New York Post, which is usually a Trump propaganda rag. The November 4 article was titled, “USPS says huge amount of mail-in ballots were not delivered”. I would post a link but the mods would likely delete it.
Relevant quotes from the article:
“In Philadelphia, 33.7 percent of mail-in ballots were not delivered to election offices on Election Day, the data shows.
In Atlanta, the same goes for 17.9 percent of mail-in ballots, and in Detroit for 21.1 percent, the filing states.”
The election was not close and it would have been a bigger blowout had the USPS, under the control of Trump’s stooges, done its job.