For pipeline builds it seems like the svn revision information isn't displayed on the build page like it is for normal freestyle builds.
Correct me if I'm wrong but this seems like a bug to me, the corresponding information is shown correctly if I check out a git repository.
I've attached some screenshots of a freestyle build and pipeline build.

After looking in the build.xml and comparing between a freestyle build and pipeline build it is clear that the information is there, it is just not presented in the UI.

Workflow script:

node {
    svn '<<<svn-url>>>'
    bat 'echo "%BUILD_NUMBER%" > hello.txt'
    archive '*.txt'
}