When mirroring the MetaHuman Face_Archetype_Skeleton it has been noticed that some curve names are not mirrored correctly (such as head_lod0_mesh_mouth_lowerLipDepress_left) while a large number of CTRL curves don't appear at all.
The default Mirror Find Replace Expressions do not cover entries where the suffix is left or right (only prefix), however even after adding these it still does not work as expected.
A lot of replacements do work as expected (where the token is mid-string), and seems to be the suffix in particular causing a problem.
Discussed with [Link Removed] on Slack.
1. Create a new Mirror Data Table asset
2. Select MetaHuman's Face_Archetype_Skeleton
3. Add Mirror Find Replace Expressions for left or right suffix
4. Click accept
5. Notice that curves with left or right in the suffix are not mirrored correctly
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-328809 in the post.