Magma Cube Farms
Magma Cube farms are not modified on Vanilla+.
Magma Cube farms are useful on Vanilla+ if you wish to build a gold farm that utilizes magma blocks, since you can craft magma blocks with magma cream.
Spawner Based Magma Cube Farm
Automatic Magma Cube Farm
Note that when going to AFK this farm, you must change your AFK spot to be 24 blocks above the centre of the farm.
Looting Nether Portal Based Magma Cube Farm
This farm will produce more magma cream than you will ever need and can also be modified to farm Froglights.