Accurate guess or Expected Outcome?

Do you find it strange that the below Adverse Events of Special Interest (AESI) list was created by the WHO in May 2020...well before any vaccine manufacturer had commenced human clinical trials for COVID-19 vaccines?

Source: https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.who.int/docs/default-source/covid-19-vaccines-safety-surveillance-manual/covid19vaccines_manual_aesi.pdf&ved=2ahUKEwjvoPrGrtPwAhWp4HMBHdXpBxYQFjAAegQIDhAC&usg=AOvVaw06v2FnPUvMdY55olqeNLz2&cshid=1621345613515

Furthermore, the WHO were already developing Adverse Events of Specific Interest (AESI) confirmation forms in December 2020, before the vaccine rollouts began

If no one knew the COVID-19 vaccines could lead to health impacts such as...

heart failure

myocarditis

coronary artery disease

coagulation disorders

thomboembolisms

haemmorrhages

thrombocytopenia

acute disseminated encephalomyelitis, meningoencephalitis

acute liver injury

acute cardiovascular injury

acute kidney injury

GBS

vasculitis

multi-system inflammatory syndrome

etc. ...

And they werent reported in the trial summary reports...how were these specific adverse events selected by the WHO ahead of time?

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What information was known about the COVID-19 Vaccine adverse events prior to the rollouts that was not documented in the trial results by any company/manufacturer?