'Decal Blend Mode' in the Result node is missing

'Decal Blend Mode' in the Result node is missing. The user that reported this noticed it when converting from early access to Preview 1. Their emissive decals stopped blending.

1. Open any project made in Preview 2 or potentially Preview 1(19044958)
2. Create then open a new Material
3. Select the Result node in the editor graph
4. In the Details panel search for Decal Blend Mode

Expected Results:
Decal Blend Mode will be greyed out in the Material section.

Actual Results:
Decal Blend Mode is missing.

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