Are you sure that it does not work? No Omnia passes factory tests without this automatic switch being tested. I think that it worked but problem you have is with unsupported SFP module. (Note that link is not modified, uboot just loads different devicetree).
We can’t be blamed for unsupported SFP module the same way as we can’t be blamed for unsupported usb device or PCIE device unless it was shipped with device. And your argument that because of upstream doing support it is just an fortunate then the USB is also just a fortunate feature because driver is not written by us. Makes sense I hope.
Please note that link you posted is fo OpenWrt and is about year or more older than current version of Turris OS. Also some hacks we can do are not accepted to OpenWrt so not available to you there.
Come on I understand your flustration but there are a lot more pluses over minuses.