Example XP Tome recipe with max XP of 10000, retrieve until next level, and a retrieval percentage of 43%

xp_tome.json - 1.20.6+ recipe for datapack.json

{
  "type": "minecraft:crafting_shaped",
  "category": "misc",
  "key": {
    "B": {
      "item": "minecraft:book"
    },
    "E": {
      "tag": "c:ender_pearls"
    }
  },
  "pattern": [
    " E ",
    "EBE",
    " E "
  ],
  "result": {
    "components": {
      "xpbook:max_xp": 10000,
      "xpbook:retrieval_percentage": 0.43,
      "xpbook:retrieve_until_next_level": {}
    },
    "count": 1,
    "id": "xpbook:xp_tome"
  }
}

xptome-server.toml - <=1.20.4 equivalent config file.toml

max_xp = 10000
retrieval_percentage = 0.43
retrieve_until_next_level = true
retrieve_xp_orbs = false
store_until_previous_level = false

I just can't get this to work in 1.21.1
any chance to get a new sample?

Gosh tooke me forever to make it work. Here is what I have for 1.21.1

{
  "type": "minecraft:crafting_shaped",
  "category": "misc",
  "pattern": [
    " E ",
    "EBE",
    " E "
  ],
  "key": {
    "B": {
      "item": "minecraft:book"
    },
    "E": {
      "item": "minecraft:ender_pearl"
    }
  },
  "result": {
    "id": "xpbook:xp_tome",
    "count": 1,
	"components": {
		"xpbook:max_xp": 9999999999,
		"xpbook:retrieval_percentage": 0.99,
		"xpbook:retrieve_until_next_level": {},
		"xpbook:store_until_previous_level": {}
	}
  }
}

maybe the tag key got changed? no idea

The recipe I posted in the example above was generated in 1.21.1 and I tested it to make sure it works. I can assure you that it does indeed work. Perhaps some modification you made to it was faulty. One possible error is that xpbook:max_xp can be at most 2147483647. Values above that can make the recipe not load.