Coreelec does not boot in X96 mini

[Portisch]

You need to open the box and search for the UART header or you can use the SDIO adapter:

CoreELEC Team SDIO Debug Board

CoreELEC Team SDIO Debug Board v1.0 20200310 [2020-03-11 07_42_58-sdio_3D_1] [2020-03-11 07_42_58-sdio_3D_2] [IMG_20200409_105659] [IMG_20200409_105859] [IMG_20200409_110116] SDIO Debug Boards current stock: 0 Back in stock (approximately): unknown Current price (including postage and packing by standard mail): €15.00 Researched and developed by Team CoreELEC by @anon88919003, @Portisch and @vpeter, we proudly present the universal Amlogic SDIO debug board, the SDIO debug board …

Or just try the Amlogic-ng image!
Or you invest into a S905X3 or S922X…