How do i stop nation entering International competitions within a Super League database?

Morning,

This is my first post so apologies if it is not in the correct section and please feel free to help and move if necessary.

I have created a World Super League, I wanted it simple and to play ball with my OCD.

I feel I have done a decent job with a 5 tier system, with every team having a Reserves and U18 and those respective leagues matching up exactly with the main tier system. All is working perfectly.

My issue is, having commandered Andorra as a nation and changing all the relevant details so that it is now a "World Nations" and hosts my Super League structure, I want to stop "World Nations from entering all International competitions.

Doing so for the FIFA World Cup is easy enough by unticking the 'World Governing Body Full Member' box
but I can't seem to stop them entering future Nations League and European Championship qualifying etc. I have tried removing them from the registered teams but that has not helped. Has anyone got any advice or help on this please?

I'm pretty OCD with my FM editing unfortunately, and the though of World Nations getting to a final of a major competition and marring the history books annoys me so I have to constantly keep an eye on it. So far in my bug checking holiday sessions they have only ever managed to get to the quarter finals of the European Championships in 2032. but id prefer to not have to think about it!

Any help greatly appreciated

Cheers

J