Drop Mob Spawner Add-on 1.21+

Even if you think that something cannot be done or achieved, Minecraft can always surprise you. The game always leaves at least a small chance that anything is possible. The mod Drop Mob Spawner, for example, allows you to harvest a Mob Spawner without breaking it.

To harvest, you will need a regular Netherite pickaxe. You can place the block wherever you want. This simple add-on provides the ability to break Mob Spawners.