I seem to remember there was an issue with the Colorsoft installs earlier in this thread where the KUAL install did not work with a device not supported message in the log file however that was fixed around message#25 in this thread.
Looking at NiLuJe's thread, the KUAL (coplate) version shows the filename as KUAL-18b218e-20250103.tar.xz from which you would extract the .bin files. The one from the Modding page shows the version you would need as Update_KUALBooklet_ALLDEVICES_KS2_install.bin. The coplate version from NiLuJe's page has a_hotfix_ file in the archive named (Update_KUALBooklet_hotfix_f190a38_install.bin) which is mentioned in the instructions.
I helped one acquaintance jailbreak his Oasis earlier this month and we went through the steps on the modding page. For some reason, log ;mrpi did not seem to want to install KUAL so we ended up copying the hotfix.bin file to the root of his Oasis and then using Update Your Kindle to install it after which we used log ;mrpi to install Update_KUALBooklet_ALLDEVICES_KS2_install.bin in the hopes of getting any updates.
I'm not sure if Update_KUALBooklet_ALLDEVICES_KS2_install.bin would allow you to install it using the Update Your Kindle tool but it might be worth trying.
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