What does it mean for a SWF to be "democratically accountable"? Given SWFs generally act like other large scale institutional investors - I suppose democratic

What does it mean for a SWF to be "democratically accountable"? Given SWFs generally act like other large scale institutional investors - I suppose democratic accountability has put political pressure on some SWFs to act on ESG concerns (changing investment strategies away from fossil fuels towards renewables, voting in favour of climate activist resolutions, etc) but apart from that, is there any reason to think that the Crown Estate is doing a bad job at maximising returns to the government? (And to be clear, though I suspect you know this - I'm not using the S in SWF to refer to the head of state specifically, but to the government, as is the traditional meaning)