Unable to bind float variables to certain properties in Widget elements. You are able to bind Structure floats if needed as a workaround.
Repro Rate: 3/3
Tested this in //UE4/Release-4.27 @ CL#18319896 and I was able to bind float variables to the percent property of the Progress Bar, it is a regression!
Results: User is unable to bind the newly created float variable.
Expected: User is capable of binding the float variable to the percent property of the Progress Bar
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-148560 in the post.