Boat killing chamber gold farm

Zombified piglin gold farm on the nether roof, twelve magma block layers deep. A skeleton at the bottom shoots a piglin sitting in a boat, the anger spreads through the whole stack, and the piglins path into nether portals set two layers apart. They land in an overworld water elevator and go straight back through a second portal into a boat killing chamber, where you swing a sweeping edge sword at an armor stand. Blue ice and pistons carry the drops to crafters, so the chests fill with finished gold blocks. Turtle eggs pull the piglins in before the skeleton is aggroed, and the skeleton has to be re-aggroed every time you log back in. It only runs properly in single player, or on a server with nobody else in the overworld, because the piglins despawn as soon as another player loads those chunks.

At 0:44 the video leaves the west side open. It has to be the north side, the creator confirmed the mistake in the comments.
Use blue ice, not packed ice, and normal boats, not bamboo rafts. Rafts have a different hitbox and the drops will not fall through.
Drops jamming on the ice road is a server software problem. Turn off spigot and bukkit plugins or run vanilla, and the creator says paper has no fix.
If the skeleton keeps dying, cage it with nine iron bars on top of the stone walls and eight carpets above those, centre left open. Removing the third layer boats is the description fix but it stops the upper layers aggroing.
Get the skeleton to shoot a piglin in a boat every time you start the farm. Builders who skip it report about 650 gold blocks per hour.
The armor stand breaks during long AFK sessions. Hit it from directly in front, keep knockback and fire aspect off the sword, and slow the autoclicker to about 11 ticks.