The RK3188 is a very old chipset (circa 2013), and there is no official Android 10 support for it.
A guide for installing Android 10 on an RK3188 device for free requires a significant disclaimer:
Flashing a custom ROM on RK3188 requires Windows PC (or a VM), a USB A-to-A cable (male-to-male), and a paperclip to short the NAND pins (for some devices).
: You can search for specific "Android 10 firmware for RK3188" on community forums like XDA-Developers
Custom ROMs
: Look for optimized Android 4.4 or 5.1 ROMs on communities like XDA Developers or Slatedroid. Android 5.0 Lollipop Now Boots on Rockchip RK3188 Tablets
Description:
Unlock the full potential of your Rockchip RK3188 device with this free Android 10 port. Designed specifically for legacy TV boxes and tablets, this firmware provides a lightweight, modern operating system experience without the bloatware.
To find the right "free" firmware, you must know your exact Wi-Fi chip and board version, as a generic RK3188 ROM might break your Wi-Fi or Bluetooth. 2. Required Tools for Installation