Question about animation mirroring feature

Today Epic games removed this feature Trello which would have solved the problem of exactly mirror an exported animation, which only actual solution is using autodesk which is not free.
Our only solution would be Blender and is pretty good, but blender doesn’t have this tool.
This features got 168 votes, which is pretty high and was requested since 2014
I made this thread, so everyone that wanted this feature knows, why this feature got removed?
Don’t get me wrong, i love epic games! But i would like to find an answer and, if possible, a solution to this problem.
English is not my native language so there will be mistakes.