stararmy In accordance with this article: https://webmasters.googleblog.com/2019/09/evolving-nofollow-new-ways-to-identify.html It would be prudent to add "UGC" and "UGC nofollow" as an alternative to nofollow for external links in Dokuwiki installations.
stararmy Update: Found my Github login and submitted a request: https://github.com/splitbrain/dokuwiki/issues/2852