Hello, I think it is important, when classifying a coin in the Coin catalog or in Exonumia, to analyze the status of the issuer.
In my opinion, all countries with total or limited recognition and whose Government has officially issued some coins (whether or not they are in circulation), these should be in the Coin Catalogue.
I don't think it makes much sense to compare a recognized Official State like Andorra with a Micronation, so comparing the coins that these entities have issued doesn't make much sense either.
From Wikipedia: “A micronation is a political entity whose members claim that they belong to an independent nation or sovereign state, but which lacks legal recognition by world governments or major international organizations. Micronations are classified separately from de facto states and quasi-states; they are also not considered to be autonomous nor self-governing as they lack the legal basis in international law for their existence”
Example of Micronation: Sealand

The Andorran Diner is a collector's coin, it was not used for transactions, but it has its own ISO Code (ADD) and it was issued by the Official Government of a State with full recognition, that is the big difference for me.
All catalogs (online or printed) classify the Andorran Diner as a currency, for example in Krause they have a KM reference and not X, and if we look at the rest of the catalogs the same thing happens. I don't think that in this case, pretending to be different would make us better.
Having said this, I think that in the case of Micronations, it would be good to have a single criterion and group them all in the same place, but in which one, that is no longer clear to me.
Coin referee for: Andorra, Equatorial Guinea, Marshall Islands, Moldova, Liberia and Spain
Banknote referee for: Andorra, Equatorial Guinea and Spain