>
is irrelevant for this. They are deficit spending in their local currencyIt's incredibly relevant for balance of payments [1]! This is international banking 101.
If they want a stable currency while deficit spending and maintaining monetary sovereignty, they need to sell assets and/or clamp down on capital flows [2].
If selling, it will mostly be dollars, because that's what folks want and what they have. That's what they're doing.
> They are just diversifying their reserves
No, their reserves are going down. They are also diversifying. But anything other than them net selling dollar assets would be incrediby weird.
[1] https://en.wikipedia.org/wiki/Balance_of_payments
[2] https://en.wikipedia.org/wiki/Impossible_trinity