People do not realize what CBDC really is, and that's why they are so afraid of it. The reality is that it's something simple, it's USDT or BUSD basically but controlled by the government. First of all, when we get in and out of exchanges KYC means we are already tracked, which means when you turn your USD into USDT that means you are already tracked. So instead of trusting a company in the Bahamas and buying usdt, or trusting CZ and buying busd, you will trust the American government and buy their CBDC instead for example. I still wouldn't trust the nations listed in OP's message, but if a big nation does it, then I will trust it.
The majority of other countries are also developing their own CBDCs and we will see them within the next year or two. If we talk about the impact of CBDCs on bitcoin, they don't really have any effect on bitcoin, as you said they are stable coins but issued by the government, not private companies.
But they will greatly affect our privacy, once CBDC is implemented and obligatory, we will be completely controlled by the government. It's something I almost don't want to happen, but it's going to be hard to avoid.