Camera Raw: How do I use local adjustments presets from Lightroom?

We are talking local adjustment presets here, not develop presets. I do not think Lightroom can save those in .xmp format. You could perhaps save all metadata to .xmp and then edit this in a text editor, but I doubt that will be faster or easier than the above method.

adobe doc on local adjustments for raw says:

Local adjustments are saved with an image in an XMP sidecar file or in the Camera Raw database, depending on what’s specified in Camera Raw preferences.

https://helpx.adobe.com/camera-raw/using/make-local-adjustments-camera-raw.html

Whether there's a 1:1 from lightroom to raw, can't say.

Please read the original question. The OP asked how you can convert Lightroom local adjustment presets (which are still in the old .lrtemplate format) to ACR local adjustment presets (which are in .xmp format).

The above info and link deals with where local adjustments, when applied to an image, are stored. In Lightroom all edits (so including local adjustments) are stored in the catalog, in ACR they are either stored in .xmp files or in the Camera Raw database, depending on your preference settings. Yes, Lightroom can also write edits to .xmp, and that is how you can sync edits between Lightroom and ACR. That is actually what I use in the method I describe above so that info was already there, but writing edits to xmp by itself does not answer the OP’s question. The trick is that you have to select the local adjustment in ACR (select the tool, then click on the pin) and then save that as a new preset.

I *did* read the OP. Lightroom as of like, 2018, uses .xmp instead of .lrtemplate for presets as well as for one-off file associations. That's the whole reason for the OP question in the first place. So unless the OP is using a 2 year old version of Lightroom, .xmp is the correct format for presets in both LR and ACR.

Max, I suspect you're misunderstanding. Develop presets, yes, use xmp since the April 2018 release. Local adjustment presets, as in, such as "soften skin" are still lrtemplate format for Lightroom.

Ahhh, thank you. I thought the gradients were "local" since they were part of the same local adjustment toolbar in LR. Since the OP specifically called out "radial filter" that's what I tested. In making a new LR preset, I do not even see the option to include any local adjustments. Just the graduated and radial filters.