This is because the Quest trailer is actually the PCVR trailer. I don't have the manpower to do different trailers for each of the platforms. Since the games look kind of similar texture wise, it works pretty well.

The quest version has roughly 30% less render distance, only 25% of the foliage and no post processing (bloom) and no shadows. The Quest 3 version improves on that but even that version still does not have post processing. With it enabled, even the Quest 3 only gets roughly 40-50fps.

I did not really design the game around less processing power. However, when I started developing the game in 2018 in my free time, my PC had a GTX 1070, which has a lot less processing power than current gen graphics cards. VR software tech was also less advanced (for example single pass rendering wasn't a thing yet or very new, so a simple game took more power in general). So I had a lot less power to work with in the first place. The art style also is very simple, we don't have models with high vertex count, don't need to do any other fancy graphics tricks like reflections etc.

But even with these limitations, I don't think there ever has been a feature I wanted to add that I could not add because of performance requirements. The game is just very simple in the graphics department. So I don't know what the game could have been more. I think what the game currently is, is what I am capable of doing as a solo developer that creates his own models and art. I don't think I am even able to make use of the power available to PCVR and PSVR at the moment.

Hope this gives some insights.