Q.accidentally dug up pineapple lily bulb cluster
I just accidentally dug up a pineapple lily bulb cluster in one of my outdoor pots. If I stick it back into the pot, how deep do these bulbs have to be buried? The bulb mass is about 6 inches in diameter, so do I just let it be?

I would recommend replanting your pineapple lily in your pot at a depth of at least 6".
For more information on the care of pineapple lilies, please visit the following link:
https://www.gardeningknowhow.com/ornamental/bulbs/pineapple-lily/growing-pineapple-lilies.htm