My understanding about the transparency has always been that it was “transparency by default” meaning that the question is “why shouldn’t we share this?” instead of "should we share this? ".
My best guess is that as time has passed the list of reasons not to share has been ever increasing and therefore less is being shared. This could (and has) been construed as Monzo no longer being transparent. There’s probably a bit of truth in both evaluations to be honest.
When people mention transparency I think most of the time what they really want is engagement. They want a feedback loop similar to the thread Bruno and team ran on the redesign or a rough view of the direction of travel more regularly than once a year.
Most people can probably understand why the community doesn’t get early sight of products but there has been a marked drop in participation by employees on the forums (with a few exceptions). This is probably due to time and number of employees but as @BritishLibrary says the community was a USP of Monzo and with all the progress/mimicking at high street banks now what differentiates Monzo?