Conspiracy theories that are proven to be fact? Here are a couple two or three.
Chem-trails are not real
mRNA Covid-19 Vaccines are safe and effective.
Masking will help stop the spread.
Trump saying he is being spied upon.
The Hunter Biden laptop is Russian Disinformation
Trump is a Russian spy and Russia helped him get elected
A 'fact' is not a proof nor a Universal Truth. These are not facts, they are arguments.
A 'fact' is nothing more than an assumed predicate. It is used as a shortcut, so that predicates to an argument don't have to be restated each time.
If the assumed predicate is brought into question, it ceases to be a 'fact'. It becomes an argument.
The Sock (who is also known by Sybil, also known as 'Doc') is trying to blame the problems of Biden on Trump. He's a Democrat, trying to hide behind the Constitution he despises.
He also has the habit of assigning fictional statements to people that they never made.
Now let's look at the so-called 'conspiracy theories' that you listed:
"Chem-trails are not real"
This is correct. The trails left behind jets is not some mysterious unknown toxin intentionally sprayed over populations. It consists primarily of water, one of the products produced by burning jet fuel. CO2 is also produced, but it is not visible.
"mRNA Covid-19 Vaccines are safe and effective."
mRNA treatments are not a vaccine. The Covid19 shots are generally 'safe' (other than allergic reactions to the carrier), but DO cause an intentional infection of Covid19.
"Masking will help stop the spread."
N95 masks (and the cloth masks which are even worse) do not stop any virus. N95 is a dust mask.
" The Hunter Biden laptop is Russian Disinformation" The laptop is evidence intentionally being withheld illegally by the FBI.
" Trump is a Russian spy and Russia helped him get elected " Turns out that Putin, who is a socialist, wants SOCIALISTS to win. In other words...DEMOCRATS. Russia has no capability to help anyone get elected.