I have a bad news.
For DVB-T is used AVL6762 demod and Rafael R836 tuner. AVL6762 use the same drivers as AVL6862 omitting DVB-S part. For tuner R836 there isn’t open-source linux driver.
For DVB-S is used Montage Technology M88DS3103C demod and Airoha AV2018 tuner. For demod is driver only for B version and I am not sure if it is compatible with C. For Airoha tuner I tried to use driver for AV2017 but with any success properly detect chip.
I gave up any other investigations. This box is unsupported by CE. I think Mecool KI Pro is better option, for less money you’ve got box with larger memory, faster ethernet, more USB ports and fully supported by CE.