I cant seem to find the hallow in hardmode? [closed]

Hallow can only affect dirt, stone, and sand. Mud, which the jungle is made up of, can't be Hallowed. (However, the Hallow/Corruption/Crimson can convert mud into dirt, and then spread to the new dirt block. This does not happen during the initial generation of the hardmode biomes though.)

When you kill the Wall of Flesh, a 'V' of Hallow and Corruption/Crimson appears in your world. Usually this is pretty easy to find... however, if one side of the V ends up being in the jungle, you might not see the new Hallow/Corruption/Crimson biome until you dig down quite a bit, since the jungle is not overwritten when the V is created.

If you can't find Hallow try to destroy some demon altars with your PwnHammer.

Upon destroying a demon altar more corruption/crimson and hallow spawn alongside some new ores in your world.