Can I unplug my BitBox02 while I'm waiting for a transaction to confirm?

Your BitBox02 does not have to be plugged in in order for you to receive a transaction. While you are waiting for your transaction to confirm, you can quit the BitBoxApp and unplug your BitBox02.

As long as you have confirmed the receiving address on your BitBox02 display, any transaction sent to that address will show up in your wallet, no matter when (days or weeks) that transaction receives confirmations on the blockchain.