Every one of these sources is a dead end. They all point to other news articles that make similar baseless claims or webinars on YouTube (?!). Or worse, they cite themselves as evidence.

No evidence?

[…]

I’m not claiming these sources (all of which, but especially the third one, rely on other, specified sources) are necessarily trustworthy, etc. But evidence is absolutely being claimed.

Yeah. Claiming there’s evidence and actually providing evidence for such claims are completely different. That’s the whole point.