Slime Farms

Slime Farms are slightly modified on VanillaX because the majority of 1.21 oozing slime farms do not work due to VanillaX's entity cramming limit being set to 8 entities with scaffolding and vines not preventing entity cramming.

Manual Slime Farms

Minecraft 1.21 | Easiest Slime Farm | For A Casual Player's Needs - YouTube

Video by Xisumavoid

This Slime grinder uses trial chambers to quickly farm stacks upon stacks of slime in a very short period of time and is all you need if you do not need an excessive amount of slime.

Automatic Slime Farms

Minecraft 1.21+ Beginner Slime Farm - NO Slime Chunks Needed - YouTube

This Slime farm utilizes a spawn biome to automatically farm slime and is a great choice if you need a lot of slime.