Thanks for replying in more detail about why you’d like to see this feature. I have used this information and comments from others on this thread to enter a feature request for “Auto T-Pose:” JIRA[UE-19768]. If this feature is implemented, we will post an update to this thread.
In the meantime, a couple of suggestions:
I realize you’ve said you’ve read the documentation, but the section “Retargeting Adjustments” specifically addresses fingers with different bone numbers and how this can *sometimes easily be addressed by recursively setting translation retargeting to the Skeleton. (Disregard this if it does not apply to your specific situation.)
If you retarget to a skeleton in one project and *migrate those assets to a new project that uses the same source skeleton, you should not have to do this again.