Allium in raised bed?

Hi everyone, I grew my allium in a raised bed this year and they didn't do to bad. I planted the allium about 6" deep The bed is newish so there's be quite a bit of soil settling. I'd just like to ask will it be ok just top up the bed with soil or is it best to lift them and replant them at 6"?
Thanks.

 

They will raise or lower themselves into the soil to a depth where they are happy. So no need to lift and replant.

 

Thanks @Palustris