There’s no good solution to this other than setting up your auto exposure carefully to avoid excessive fluctuations in brightness. Which is more difficult to do in some scenes than others.
UE5 has a local exposure post process which allows different exposures for different parts of the screen, it works pretty well and does a good job smoothing out shifts in exposure, I posted about it here.
An less realistic solution that has some benefits is to use a low intensity directional light. Since the sun is usually the brightest light in the scene, this reduces the dynamic range and produces less jarring auto-exposure transitions. The tradeoff with this is that it means all the other lights in the scene will appear to be unrealistically bright by comparison.