Blank description and package details information on a newly combined variation listing

Hi,

I combined 4 different stand-alone listings into a variation listing by creating a parent ASIN.

So now all 4 products are in one listing, however, all product description including bullet points and package dimensions/weight are blank.

Do I have to update the information manually one by one again?

Or it takes some time to update the information automatically?

Thank you for any help!