Hi there & welcome to the forum.
2 weeks is a very short period of time. The budgies are still settling in to their new home and it's too soon to be expecting much progress towards taming. Taming is all about building trust and needs to be done at the bird's pace.
Here is a link to a page of stickies:
Stickies are short information pages covering various topics and they are listed in different sections.
I suggest that you have a read through, starting with:
It is true that it's usually easier to tame a single bird than multiple. This is because a budgie will almost always choose another budgie to bond with over an owner. It doesn't mean that your pair can't be tamed, but it does tend to take longer and you may not get as close a bond as you could do with a single bird.
'Tame' means different things to different people.
I have 2 male budgies. They're not tame but they're not phased by my hands in their cage, cleaning & rearranging things. They'll eat from my hands and step up for millet but wouldn't choose me as a friend to play with.
Whilst at times, I would love them to greet me with the enthusiasm of a pet dog rather than indifference/ mild curiosity, on the other hand, they're very entertaining to watch interacting and I'm comforted to know that they have each other for company whilst I'm at work or otherwise busy.