Saying that a country mining its own Bitcoins is unique may seem true, but it’s not the only viable approach. For example, El Salvador has chosen to buy Bitcoins to diversify its reserves and stimulate its local economy. This is a strategic choice that shows purchasing can be just as relevant, if not more effective, than mining.
I don't know if you understood what i said, i never said mining is the only viable option, i called it unique because it is unusual to see a country mining their own BTC, it shows they are friendly to BTC and most countries are unfriendly to BTC.
Similarly, the Central African Republic has legalized Bitcoin and also opted for purchasing, which demonstrates that there are multiple ways to engage in the Bitcoin ecosystem. Mining requires significant resources, including energy and infrastructure, which may not be realistic for all countries.
BTC is no longer a legal tender in Central African Republic, it was legalized by their government, but they have long rescinded that decision and neither are they purchasing BTC, they have bigger problems in their country right now.