Hello Karl,
As far as I know, Photolab2 does not contain the NIK Collection, ( https://support.dxo.com/hc/en-us/articles/360028526451-If-I-buy-DxO-PhotoLab-2-ESSENTIAL-or-ELITE-why-don-t-I-get-Nik-Collection-2-by-DxO-included- ), but can use the filters of the NIK Collection directly.
For Affinity Photo you need the Photoshop plugins, which you can identify by the extension .8bf. Search in your program folder for the file Dfine2.8bf. If you can't find it, you don't own the NIK Collection.
The NIK Collection was originally sold for about $500, Google bought the company from Nik and offered the collection for free after a while, later it was sold to DXO.
If you don't need the actual version (it got some additional effects from DXO), you can still get version 1.2 for free and save 99 €. The free version works fine with Affinity Photo.
The (very well hidden) download link at DXO: https://nikcollection.dxo.com/nik-collection-2012/
In exchange for your mail address you will get the download link sent to you.
Set up the NIK Collection in Affinity Photo as described in my previous post, the installation folder should be \Program Files\Dxo\Nik Collection\Nik Collection
regards,
Chris