Allwinner A133 Firmware Better Guide
Most A133 firmware is rootable via Magisk using the boot.img patching method. (Do not use SuperSU; it is obsolete for Android 10+).
fstrim -v /data fstrim -v /cache
Ironically, industrial Allwinner A133 boards (used for kiosks and POS systems) ship with than consumer tablets. These "headless" builds (no GUI bloat) are sometimes leaked and can be modified for tablet use. They offer sub-second boot times and rock-solid stability. allwinner a133 firmware better