I used to live with someone who believed that the Earth was 6000 years old and that the Great Flood happened, complete with Noah. There are masses of pseudo-scientific papers on the internet to back this up. She had answers for everything and you couldn't argue with things like 'the speed of light was different in the past', because, well, I don't know how to.
I've looked at an awful lot of conspiracy theories online and a popular tactic for sucking you in is to present you with a photo and then ask you a question about it that you can't immediately answer - something like 'if there's no wind on the moon, why is the flag flying?' Or 'if a plane hit the Pentagon, where did the wings go?'. You pause and go 'huh' and then they present you with a plausible-sounding solution. (moon landings fake/it was a bomb not a plane etc). They then bombard you with further, carefully curated 'evidence' that supports their narrative, and depending on how far you get sucked in, gets further and further removed from reality.
You have to be really careful, I've found myself needing to give my head a shake and remember what's going on when looking at photos of the gas chambers at Auschwitz from a Holocaust denial viewpoint, or the Boston Marathon (crisis actors). They confuse you, then try to capitalise on that confusion.
There was a long series of threads on MN a while back that believed that Louis Tomlinson's baby was fake and a doll. So many posts and photos showing why it was fake. I guess most would have given up when the baby was obviously not a doll, but there's probably a hardcore element that just amended that to 'they then bought a real baby'.
There have been articles lately from former QAnon believers who had the scales fall from their eyes when Biden was elected and Trump didn't return to the White House. But of course there are hardcore believers who just amend the conspiracy theory to continue to fit.
I guess your friend might stop believing it's a conspiracy when either it affects her personally, or lockdown continues to lift and things start to get back to normal without us all being microchipped. Or she might go further down the rabbit hole.