Yes, that is going to be the problem, isn't it? How often is it going to be updated or is it accurate?
There is a statement about each country when you continue scrolling on the page. Here's the one for Belgium.
Belgium
Belgium has restricted the entry of all travelers who are not arriving from EEA Member States, Switzerland or the United Kingdom.
Nationals, permanent residents, and long-term visa holders of EEA Member States, Switzerland, and the United Kingdom, and their family members may still enter Belgium.
Diplomats, humanitarian aid workers, and military personnel may also enter the country.
Nationals of Andorra, Monaco, Montenegro, North Macedonia, San Marino, Serbia and Vatican City may enter Belgium with proof of connection travel to their home country.
Passenger flights are only allowed to operate between 7:00AM and 9:00PM. This does not apply to humanitarian, repatriation, and United Nations flights.
Seems to be pretty comprehensive but hopefully we can, at least, use it as a place to start looking. It might not be the final source, but I thought it could be helpful.