Haleu fuel is pretty common that’s enriched up to about 20%. Highly enriched fuel is still used for nuclear power on aircraft carriers that use 93% enriched U235.

Iran is definitely just trying to make weapons but wanted to at least give some examples of higher enriched fuels

It’s a big issue everywhere, Japan in particular has it worse than others because of their robust social support network so you need a large working population to be able to fund it and due to their shrinking population funding social services their deficit has been increasing and is reaching a bad point where their deficit is around 2.5x their GDP so they are going to bury their future already shrinking population in debt

Consider more recent history, since 2000 what countries have China invaded?