ptwiki campaigns are missing on UI, despite some statistics are provided. Seems that ptwiki isn't listed, despite having campaigns in the past.
https://labels.wmflabs.org/ui/
https://labels.wmflabs.org/ui/ptwiki/
https://labels.wmflabs.org/stats/ptwiki/93
https://labels.wmflabs.org/campaigns/ptwiki/93/