Must be on the ballot in enough states to win the election.
That’s going to automatically cut out 95% of them.
Must be polling at least 3% in 3 statewide or national polls.
That will leave you with:
Harris
Trump
Stein
Oliver
Debates aren’t about “giving everyone a voice”, if you can’t become a viable candidate without a debate, the debates can’t help you.
Only surprise here is “Why did it take so long?”