FAB is the merger of the Unreal Asset Store, Quixel, and Sketchfab, which increasingly has more and more Unity assets on it.

Unity is no longer doing HDRP.

Unity is also generally financially floundering.

Tencent owns 40% of Unreal.

Tencent bails out financially floundering gaming companies by purchasing significant controlling stakes in those companies.

... conclusion:

Tencent owns a large share of Unity, we just don't know about it officially/publically yet.

Large known investors in Unity include:

Vanguard

BlackRock

Sequoia Capital

Silver Lake Technology Management

Wellington Capital Management

... all of these either literally are Private Credit/Equity firms, or they have significant exposure to Private Credit/Equity firms.

At the moment, and over the last 6 months roughly... Private Credit/Equity firms are basically all undergoing the Private Credit/Equity equivalent of a bank run.

They need cash NOW, so they sell to Tencent, Tencent establishes said controlling or at least substantial position, starts giving orders to Unity.

Thus, Tencent owns substantial parts of both Unreal and Unity.

.... but thats just a GAME theory!!!