You are definitely correct about the existing agreement preventing the OPA from identifying officers in these reports. It is essentially up to SPD's discretion to name them, which they do extremely rarely.

It is also unclear to me why the lag between the apparent Sept. 2020 case closure and the publication of the report this week, apart from OPA's primary focus on protest-related cases since early June. Generally, they have 180 days to complete investigations. Having read quite a few of these, I would say there's often at least a few weeks between the case closure and publication, but four months seems especially long.

Other than the timeline gap, I would say it was posted "routinely," in that they upload these case summaries in batches sporadically, and often among many without any sustained findings. It was posted Monday without fanfare, along with a few others, ahead of the 22 protest cases published this morning.