Sure. There are several GSI builds that you can flash, including a LineageOS 19.1 ROM that runs pretty smooth. Search the Project Treble forums here in XDA for builds and installation instructions. In fact, here's a link https://forum.xda-developers.com/c/project-treble.7259/
Just to be clear, all models of the Scepter 8 are Project Treble supported. Moreover, you cannot hard brick this tablet; restoring the firmware using an Allwinner proprietary flash tool will almost always revive your device back to its factory stock state. So if you botch flashing a GSI ROM, no worries. Restore the firmware and start over fresh.