Forge version: 40.2.2
1.18.2
Whenever I try the mod while using Optifine, the reach on the Spear becomes the same as any other melee weapon, This only seems to be fixed by getting rid of Optifine but i dunno if you can look into this weird issue.

Report this to optifine, since their code is closed source i cant debug it. in the mean time, i recommend one of the various forge ports of sodium. if you absolutely cant live without shaders, look into oculus (forge iris)