It sounds frustrating to experience freezes in Minecraft after updating to One UI 7 on your Samsung device. You're right, there have been discussions about Samsung potentially switching the rendering API from OpenGL to Vulkan in newer versions of One UI.
Device : Samsung S23(Base Model)
CPU : Snapdragon 8 Gen 2
GPU : Adreno 740
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[Mod] OcelotOnesie
Jabez Capulong
This issue is being tracked at MCPE-194239.