Posts flagged as spam by Akismet are not positively indicated as such, leading to end user confusion.
These posts should have positive indication that they are being held for moderation or are flagged as spam in order to remove end user confusion.
I would suggest placing text in the hidden post area before or after the expand post ellipses that reads: "Held for Moderation: Akismet Possible Spam"
If it is desirable to obscure the reason for the hiding the text "Queued for Moderation" would also serve to indicate that the post has been properly posted to Flarum and is not being shown for a well defined reason.
As it is the posts look to be lost in limbo, something that is a not infrequent occurrence on some other forum software (coughdiscoursecough)