Most of these are small ccTLDs with minimal management. For most countries they just kind of got assigned a TLD and some random person in the telecommunications department of the government, the postal office, or a university has been keeping it going for years.

I recently tried reporting a security issue to a ccTLD. As a registrar thankfully I was able to reach out to ICANN for assistance, but even then the person who operated the TLD had just retired and there was no replacement.