OK, so there's a decision tree here going on. Bear in mind I don't know much about bay trees. But I can help you understand this and what to do. I agree with Anniekays' assessment also! Good job.
So... some trees and plants reproduce new plants through suckers coming up from the roots. If this is the case then those will become tiny sucker trees. And what you can do with plants that do make suckers coming out of the roots is basically very gently and carefully trim them away WITH attached roots to make additional new tiny new trees.
You might try to confirm if this is the case with Bay trees. But I suspect this could work?
But if its supposed to be buried then roots shouldn't be exposed. You can try to cover roots poking out because then if you don't the plant gets heat stressed. Roots don't generally like to be exposed and if they are it harms the plant, UNLESS they are suckers trying to form new plants. (Do bay trees do this?)
We get suckers constantly from plum trees. Many orchard trees in the spring you can see suckers coming up. And often they get destroyed because we only have so much space for stuff. But actually if you wanted every year many plants you could take care of the suckers
fintechzoom and reproduce the suckers into new trees and move them to other areas.