A lot of government offices do this. Even here in the United States. Local fire, police, mayor’s office, your state representatives, governors and their agencies all use Facebook to get information out to the public.
If Facebook doesn’t want to allow public service announcements etc. on their platform that’s their business model. Consumers on the other hand have come to expect some level of community public service information through that channel.
Something about this is ludicrous ... and it ain’t Facebook.