@Marcinl I presume you are not on the latest release which is 23R2 (23R2 SU1).

Because it seems like this is fixed in the latest release. But I found the same behavior in 23R1 as well.

Hope this helps !

@Marcinl Please disregard my earlier answer (it is not editable now) and sorry for the confusion. Co-incidentally I tried a serial part in 23R2.

It seems like this is auto-filled when the part is the Serial Tracked Part only. 

Therefore AFAIK your requirement cannot be achieved without a customization.

If this is frequently used, you would be able to save considerable time by automating. So in such situations, in Aurena I have used an extension which supports userscripts such as Tampermonkey/ Greasemoney. But that is a non-standard fix which cannot be recommended :) 

@Buddhika Kurera thank You for Your reply.

I tried to achieve this by changing the attribute in the Qty to Move field in Page Designer but it works differently than I thought. It just displays the quantity from the field that was indicated.