It's soldered. Socketed is a lot more expensive. There's also no point as the SoC is worth vastly more than the motherboard, so you'd probably pay 80% as much

It's soldered. Socketed is a lot more expensive. There's also no point as the SoC is worth vastly more than the motherboard, so you'd probably pay 80% as much for a new CPU as for a new motherboard with CPU. The RAM is socketed, so you can reuse that.