I fail to see anywhere in the information you provided that failing to qualify means did not receive the required electoral votes. Not one instance!
Since you didn’t agree with my sources, perhaps you could provide us with other sources which state that there is some official body that determines whether a president-elect has qualified in ways other than by receiving a majority of the votes of the Electors?
Can you name an instance where any of the previous president-elects (since 1933 when the 20th amendment was adopted) was determined to have qualified for the office in a way other than by receiving a majority of the votes of the Electors?
It only takes one Representative and one Senator to submit a written objection to the certification of the Electoral vote for both Houses of Congress to stop counting Electoral votes until the written objection is resolved.
3 U.S. Code § 15 - Counting electoral votes in Congress
https://www.law.cornell.edu/uscode/text/3/15