They also did it in 2017
Waters and other House Democrats from at least 10 states objected to the votes, raising issues of voter suppression as well as American intelligence showing that Russia tried to influence the election in favor of Trump. In each case, their objections were denied because they didn’t have the support of any senators.
Apparently they believe the only legitimate reason to question election results if for political reasons; because you got beat and you don’t like it. They’ve never suffered from fraud, so they don’t have a concept of questioning results due to evidence of fraud.