Photo courtesy of Android Authority
Or in the words of a McLaren spokesperson, the partnership "came to its scheduled conclusion recently." There won't be any more McLaren-branded OnePlus phones in our immediate future. But it seems the automaker was satisfied with the partnership, calling it a "highly successful collaboration between two iconic and innovative brands." And it looks like they aren't saying there won't be possible collaborations in the future. According to their statement, "OnePlus has been a supportive, valued partner and we wish them well and hope to see them in the future."
The two companies started collaborating in 2018, and we've seen McLaren Edition models of the OnePlus 7T Pro and OnePlus 6T. And there was the OnePlus Concept One, which never got an official release beyond the prototype.
Source: Android Authority