Block To XP Converter:

You can craft the Converter using "3 CRYING OBSIDIANS AND 6 COPPER INGOTS" 

To Access the block, you must have a block in your hand. This block wouldn't work if you press the Converter Block with nothing in your hand.

XP Rewards:

You will get XP based on how the valuable a block is, there are tiers on this Add-on on how many XPs can you get (This is it for now but it will get updated soon):

TIER 1: LEGENDARY (100+ XP)

Netherite Block: 150 XP

Diamond Block: 100 XP

Emerald Block: 80 XP

TIER 2: RARE (30–80 XP)

Gold Block: 50 XP

Iron Block: 30 XP

Lapis Block: 25 XP

Diamond Ore: 40 XP

TIER 3: UNCOMMON (10–30 XP)

Redstone Block: 20 XP

Coal Block: 15 XP

Gold Ore: 15 XP

Iron Ore: 10 XP

TIER 4: COMMON (3–10 XP)

Copper Ore: 8 XP

Stone, Dirt, Wood: 3–5 XP

All Other Blocks: 3 XP

Works With Modded Blocks:

This add-on also works with modded blocks, these are the amount of XPs that you can get from it:

Blocks with "crystal" or "gem" name: 25 XP

Blocks with "ore" name: 12 XP

All other blocks: 3 XP

Choose What To Convert:

You can choose what block or item you want to convert in here, you can also choose the amount of blocks and items that you want to convert.

CONVERT ALL:

There's also an option here where you can convert all blocks and items in your inventory into XPs.

Block To XP Converter Showcase Here: