When searching for protected pages at https://pt.wikipedia.org/wiki/Especial:P%C3%A1ginas_protegidas, I noticed that there are many without information of date of protection and username of protector. For example, the first page on this list at this moment is https://pt.wikipedia.org/wiki/Usu%C3%A1rio(a)_Discuss%C3%A3o:JLCA/Arquivo_1, but looking at the history (https://pt.wikipedia.org/w/index.php?title=Usu%C3%A1rio(a)_Discuss%C3%A3o:JLCA/Arquivo_1&action=history), the protection log is visible. In this case, user:Ozymandias protected the page at 22h52min de 21 de janeiro de 2007, with the log summary (Protegeu "Usuário Discussão:JLCA/Arquivo 1": a pedido do usuário [edit=sysop:move=sysop]). Initially I only saw on list articles that had been moved from the extint Appendix: (Anexo:) namespace (see task T75164) thought it might have had something to do with it, but then I notice it on other namespaces.
Hi @GoEThe, thanks for taking the time to report this!
Do you know if this is a regression / when this problem of not showing that data anymore started?
It seems that pages protected before march 2014 don't show that data: https://en.wikipedia.org/w/index.php?title=Special:ProtectedPages&offset=459647&namespace=12&type=edit&level=0&sizetype=min&size=; https://pt.wikipedia.org/w/index.php?title=Especial:P%C3%A1ginas_protegidas&offset=56259&namespace=0&type=edit&level=0&sizetype=min&size=