https://wccftech.com/oneplus-9-pro-could-ship-with-hasselblad-branded-cameras/

It is safe to say that there is a trend in the smartphone market that includes smartphone cameras that the biggest optics or camera manufacturers have branded in the market. We have seen Zeiss optics branded smartphone cameras in the past, but this time around, we see Hasselblad branded optics in OnePlus 9 Pro.

It is important to understand that this certification or branding is superficial at best and does not directly result in better picture quality. After all, you are still getting a much smaller sensor than actual cameras. So, more or less, this branding is a marketing schtick, but companies are headstrong when it comes to doing these things, with the latest suspect being OnePlus.