Anonym, who deleted his account is right. SFP modules that are using chipsets from Realtek RTL8672 or RTL9601 has broken the EEPROM emulator, which returns zeroes instead of EEPROM content. There is no way to get fix the emulator, however, we have two SFP modules based on these chipsets in our offices.
Our kernel developers are right now looking if there is a possibility to have these modules working in Turris OS and in the upstream kernel. I don’t want to promise anything. Because there is a going be a big chance that the patch will break others SFP as well. We will see about a response in kernel soon!