default or selected kernelversion does not have config value CONFIG_EROFS_FS_ZIP_CACHE_UNIPOLAR.
Result is shown for kernelversion 6.8.2

Unipolar Cached Decompression


EROFS VLE Data Decompression mode
└─>Unipolar Cached Decompression
In linux kernel since version 4.2 (release Date: 2015-08-30)  
For each request, it caches the last compressed page
for further reading.
It still decompresses in place for the rest compressed pages.