I suggest trying some, if not all, of the other S922X .dtb, even if they seem incompatible, just to see if one works or at least partially boots. I doubt there’s a risk of bricking the box by doing so.
Here is a list with dtb’s and their corresponding SoC supported by CE: CoreELEC - Device Trees. There are several S922X listed.
Some feedback:
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I have seen older devices unable to read above 16Gb, therefore please ensure the boot media remains within the manufacturers specified size limit. In my experience most of the OTV devices, except maybe some early first generation ones, should be able to handle 2-16Gb (m)SD Cards and USB Flash Drives without issues.
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Also please ensure all partitions have been removed from the installation media prior to burning the disk image onto it. I have encountered situations where boot was prevented due to an unreadable partition from a different OS.