You need to stake the POB before you can delegate it, staking is like powering up, it locks the POB in your account so it can be delegated. I see your POB, but only 4.411 are staked so that is the only available POB you have to delegate.
I'm not sure what frontend you use, but these buttons are very similar on Tribaldex too. Below is a screenshot, to stake your POB all you have to do is click the lock button. (purple arrow is pointing to lock button) Simply click the lock button to stake, then you will be able to delegate your staked POB.
You need to stake the POB before you can delegate it, staking is like powering up, it locks the POB in your account so it can be delegated. I see your POB, but only 4.411 are staked so that is the only available POB you have to delegate.
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I'm not sure what frontend you use, but these buttons are very similar on Tribaldex too. Below is a screenshot, to stake your POB all you have to do is click the lock button. (purple arrow is pointing to lock button) Simply click the lock button to stake, then you will be able to delegate your staked POB.
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