OK - I’ve made a camera profile for the XT5 here:
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Download from that link
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In Lightroom Classic, go to “file > import develop profiles and presets” and add that dcp file
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If you previously converted any negatives while the profile was missing, you will need to reconvert those. To do that, just select those images, open Negative Lab Pro, and go to the “convert” tab and select “unconvert.” You can then re-convert them.