If the Queen had actually been deposed, it'd be front page news on every newspaper, for weeks on end, across the globe. Well, the Anglosphere at least.
I don't want to insult your mother, so I won't, but suffice it to say she's mistaken. The Internet is so vast, so complete, that you can search for any claim and find people claiming to have proof. For example, on a whim I just searched "Jeff bezos is a lizard proof" and was served a bunch of links asserting they had proof that Jeff Bezos is a lizard person.
Jeff Bezos is not a lizard person.
The Internet does not serve up merely the truth. It serves you literally every possible opinion, literally every possible hot take, because in a world of seven billion people, no idea, no theory about the well known people of the world, is new or unique.
Everything you could think about any household name has already been thought before, and someone has cared deeply enough about that thought to rant about it on YouTube. This is especially true for the world's longest serving monarch, a woman old enough to have watched the world go through entire eras, a woman powerful enough to be on the currencies of people that don't even speak her language (probably, I don't care enough to check).