FYI I was wrong about my device not seeing 5ghz WiFi networks, I have rescanned the WiFi networks withing LibreElec and I can see 5ghz networks. Also my device MiniMC V1 (2G / 16G) according to Gearbest where I purchased it from, is also known as the MiniMX-G V1.1 . I say this becasue I opened the case and the sticker on the board reads MiniMX-G V1.1 .
So the WiFi driver for Dual band Ampak AP6330 wifi chipset is indeed included in the build. The correct DTB for this device already exists in Kszaqs device trees folder for the 006 build, I can see 2G RAM and dual band WiFi using this DTB, I havent confitmed that the ethernet is correctly detected as 1Gb but the ethernet is definitely working,.