hieppo It's the dtb. I can see there is no Broadcom WiFi device in the dtsi under the &sd_emmc_a; node:
linux/meson-gxl-s905x-p212.dts at master · torvalds/linux
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linux/meson-gxl-s905x-p212.dtsi at master · torvalds/linux
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So assuming the box has a Broadcom WiFi chip? it should be trivial to add. If you use the p212 dtb it should have working BT? - share the URL generated by "dmesg | paste" when using the p212 dtb and I can see.