"Ultra" Resolution Setting Unavailable on OnePlus Pad 2

I am playing Diablo Immortal on a OnePlus Pad 2 (Snapdragon 8 Gen 3, 12 GB RAM, 12.1" display, 3000x2120, 144 Hz). The maximum “Resolution” setting is limited to “High,” resulting in blurry and pixelated graphics, which makes the game nearly unplayable on this high-quality display. On my previous device, iPad Pro 2020 (11", 2388x1668, Apple A12Z Bionic), the “Ultra” setting was available, providing sharp visuals. The iPad Pro 12.9" (2732x2048) also supports “Ultra.” Given that the OnePlus Pad 2 surpasses these devices in performance and resolution, I believe this limitation is a bug or an optimization issue.
Device Model: OPD2403

its best to post only once, adding to multiple threads can cause confusion when responding and lost replies.