Zidoo released a new beta firmware for their model Zidoo 
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RTD1619DR
Zidoo Quick Settings v2.2.7 – McBluna.net
I’ve tried to created a modded APK for the Android 6/7.1 devices but it failed because of library dependencies.
Zidoo NEO S Specification
Model NEO S Display 5-inch OLED HD touch screen Chassis Aviation aluminum alloy OS Android 9.0 CPU Realtek RTD1619 ARM Cortex-A55 Hexa-core GPU ARM Mali-G51 MP3 RAM 2GB DDR4 Internal SSD 256G SSD (M.2 SATA 3.0 2280, up to 1TB) DAC ESS 9068*2 Bluetooth BT 5.0 Wi-Fi 2.4G+5G dual-band WiFi, 802.11 a/b/g/n/AC 2R2T MIMO 867Mbps … Read more