This does seem low in comparison to the US, where ~17% of the national budget is spent servicing debt interest. For context, this is approximate 1.5X what we spend on national defense. [1]
https://www.investopedia.com/why-interest-payments-are-blowi...
Looks like the US’s cost of servicing works out to about 3.4%, which definitely seems rather high (though, probably still not high enough that you’d necessarily want to aggressively pay it down; 3.4% isn’t a _great_ return). Actually, I’d wonder how much of this is related to the debt ceiling stuff; I would assume that makes refinancing when debt is cheap more difficult.
I don't know how or if the debt ceiling has any impact on refinancing.
My concern is that the US GDP is also fluffed up, and the situation is more dire.