Missing LV_SUBPX_RGB in lv_conf.h V9.2.2

Description

I couldn’t find LV_SUPX_RGB to enable in lv_conf.h in V9.2.2

What MCU/Processor/Board and compiler are you using?

Custom board

What LVGL version are you using?

V 9.2.2

What do you want to achieve?

Enable sub-pixel rendering for fonts to enhance visual presentation