In my country (Hungary) the Hungarian National Bank announced a tender for circulating commemorative coin because of the COVID-19. This picture won the first price, I'm not too satisfied..
Chad: In my opinion, as with all NCLT issues, it's just a quick profit scheme. The coin was designed by some private, non-Chadian firm, struck be a private non-Chadian mint, and distributed by a private, non-Chadian firm. It has nothing Chadian about it except the name "Tchad" on the coin.
I'm starting to think that the idea of the coin didn't even originate in Chad. Some company in Europe or the US probably came up with the plan of a set of COVID coins, and then they went around to find what state would buy into the project. I suspect a number of the usual guilty parties (including Liberia quite possibly) declined because of the risk to their reputation. If I'm right, I would suspect Chad wasn't on the top of the list ─ the British commonwealth's small island nations would have been higher.
Meanwhile, you don't expect the large nations with a national mint ─Canada, Australia, the USA, etc.─ to produce anything of the sort quickly, again because they care about their reputation, but also because they produce high quality NCLT pseudo-coins, which takes quite some time. In addition, a private, profit-making company would not even approach them.
As for Chad, they sell licenses. If you have a license you can issue whatever you want to. No need for permission on themes and designs. Artisan Coins, that has developed the Corona coins, already had a license from Chad.
OK for Chad, interesting. It's actually worse than I thought.
Each coin so produced and listed in the Numista catalogue should be accompanied with a warning. New collectors should be made aware of the scheme. Then, it's up to them to pursue their NCLT collection.
As for Samoa and St Helena, the coins are only indirectly related. Nowhere is the word "COVID" or even "pandemic" mentioned. In addition, the Samoa coin has not even been released yet.