[mothered]

Only worry is that it had the same details (name, address, payment method) as my other account in which I performed a refund a couple days ago, it’s changed now but can this be traced?

Previous account history Is still kept on record, which can be referenced as needed.

completed a successful DNA for AirPod 3rd Generation yesterday (received confirmation email) and purchased some junk items just now which I will keep to make it look less suspicious. Can I use the same account again?

Yes.

If so how long should I wait.

Around 4-5 weeks.