In the early versions of Minecraft and on outdated console and Java releases, a potion bottle could be thrown up to 20 blocks away. This distance was later reduced to 4 blocks. The “Legacy Potions” mod brings back the original setting, allowing you to throw potions even when you are far away from your target.
Please note that increasing the range does not apply to the slow potion, as it can cause delays and lags in Minecraft.