I think what you are looking for is Lightroom “sidecar” files. See here: https://www.beyondphototips.com/automatically-write-changes-xmp-lightroom/
From that webpage:
“If you’re working with a retoucher, this comes in handy. You can send them your RAW files to edit. Once all the work is done in Lightroom, all they have to do is send you the .xmp files.
You just copy them into the folder alongside the original RAW files et Voila, you have the retoucher’s edits displayed in Lightroom! Of course, this does not work with Photoshop edits. Only ACR and Lightroom Classic CC”.
~Darrel
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