This blog archives old firmware for S905X boxes. Search their database for "T95H firmware Android 7.1.2." They often host exclusive versions that are no longer on Baidu.
Flashing firmware will erase all your data. Back up your apps and Kodi builds before proceeding.
specifically in their firmware repository. You can find direct download links for the stock firmware and upgrade instructions on the Turewell Firmware Upgrade Page Android TV Firmware Community (Telegram) Android TV Boxes Firmware
Legal and safety considerations
: Provides firmware specifically for the T95 with Allwinner H616 SoC.