These sound a bit too powerful to be pickaxe enchantments. They sound a bit more like potion effects. Miners Delight seems to be very similar to the Luck effect. I’d make these enchantments not available in the enchantment table, like mending. However these would be very rare to find. I think only Wishbone would be an enchantment and Miners Delight would be an effect like Bad Omen, Hero of the Village or Mining Fatigue. I think you should get Miner’s Delight from a Level 5 Beacon.
Wishbone: when you are digging or in a cave, right clicking with the pickaxe with play a sound queue and point you in the direction of the nearest underground structure(if within range)
I'm not really a fan of this. It's not that hard to find a mineshaft once you've traveled far enough from spawn, it'd be more useful if the pickaxe found dungeons and strongholds, but that would be far too overpowered IMO.
Miners delight: when exploring new chunks, ores will have higher spawn rates, this rewards the player for exploration
I'm not a fan of changing the map generation based on incredibly random factors like this, or really any factor that isn't set at the beginning of the game. Besides detracting from the utility of sharing seeds, it also just means players are discouraged from exploring early-game, waiting to get a Miners' Delight pickaxe so they can maximize the amount of ore that spawns in the world. Not only that, but this enchantment only has a chance of benefitting the user on top of a chance of benefitting competitor/opponent players.
Also, it's practically useless if most of the chunks in a given radius around spawn have already been explored.
I get offtopic a lot, be warned. I also often mention a Minecraft clone called Minetest. The clone is nowhere near playable with it's default game in my opinion, but it's at least the start of a good open-source voxel rendering engine, and maybe one day it might be decently playable.