No, it is not recommended that you try and feed kohlrabi the vegetable to your bearded dragon as it is not good for their health.
More Detailed Answer
The reason why kohlrabi is bad for a bearded dragons health is because of the disproportionate ratio between calcium and phosphorus.
On top of that this vegetable has too much water content and is a bit too acidic for bearded dragons.
The water content is too much for them to handle.
On very rare occasions maybe a bearded dragon can have a bit of this vegetable but overall it isn’t a great idea to give it to them. There are far better options.
More About Kohlrabi
It is a annual veggie that can be eaten cooked as well as raw.
It is a low, stout cultivar of cabbage.
The main treats about this vegetable that are important to note for a bearded dragon is its sugar, calcium, acidic, fat, protein, water, phosphorus and fiber content.
The most important is the ratio of calcium to phosphorus that needs to be between 1:1 or 2:1 for a bearded dragon.
Unfortunately this vegetable does not fall in this range and therefore you should not feed this vegetable to your bearded dragon.