Wow, you've gone into full conspiracy mode.
So far the only so-called "evidence" provided has been in the form of irregularities that have either been debunked by multiple sources, mistakes that have been taken into account, or affidavits that have either been hearsay, come from unreliable witnesses, or simply failed to stand up to scrutiny. Also, testimonies that take place at hearings with legislators are not subject to penalty of perjury as they would be in court.
Yes, Biden was selected. But he wasn't selected by any foreign government or agency, WEF or UN. He was selected by a majority of voters here in the US in a fair and legitimate election. There was no widespread voter fraud, and no evidence of any has surfaced. This has been stated many times by election and government officials in both parties. Whatever Biden's personal beliefs or involvement with the WEF are have nothing to do with the election process.