Help with transparency effect

I can't remember if I did this double exposure effect using some Android app or other resource on or offline. It's from 2019, and this is a black and white version of a color photo of me and a scanned image of my old ID card.

Now I'm trying to get the same effect with a photo of my female cat, Wanda. I tried several ways TNA. The problem is I can't get the same level of transparency and contrast when I change settings like brightness and stuff.

Any idea? TIA!