Only because solar/wind’s been subsidized
Nothing has been more subsidized than nuclear energy. It's entire existence is predicated on public R&D. Virtually all of its generators are public projects. It's a notorious money loser to operate. We still don't have a good solution for nuclear waste, so that gets stashed on public lands and in Superfund sites, too.
That's not the reason it lags the alternatives, though. If public spending got us cheap energy with zero trade offs, everyone would be France by now.
Solar/Wind, by contrast, get dogshit subsidies both relative to nuclear and fossil fuels. It outperforms in defiance of subsidies, often growing market share in states that are actively hostile to its expansion.
Even in the face of enormous cuts to public spending and bailouts to coal, under Trump 1 & 2, renewables increased their market share.
That's because renewables aren't just efficient, they're profitable. Enormously profitable. The private sector loves high margins on their capex spend, and renewables consistently deliver.