When using SubversionSCMSource (e.g. with a multibranch pipeline) instead of the classic SCM configuration (which is used by free style jobs), there is no way to configure the repository browser in Jenkins.
Somewhat related: the checkout strategy can't be specified also (see JENKINS-41850).
The workaround which I linked to in https://issues.jenkins-ci.org/browse/JENKINS-41850?focusedCommentId=387864&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-387864 also doesn't work here, because the RepositoryBrowser can't be set in SubversionSCM.