A backfire is not the same problem as a flop
A post that gets ignored and a post that draws real, negative attention need different responses. An underperforming post is worth reviewing for a pattern over time. A post generating backlash, over something offensive, inaccurate, or badly timed, needs a faster and more deliberate response than wait-and-see.
Silently deleting it is usually the wrong first move
Removing a post that has already drawn attention, with no acknowledgment, looks evasive once people notice it's gone. On most platforms someone has already screenshotted it. A short, direct acknowledgment of the mistake, before removing or correcting the post, holds up better than silence.
Address the real issue, not a vague version of it
A vague, generic apology that avoids naming what went wrong reads as insincere. Naming the mistake plainly, what was said and why it was a problem, is more credible than a soft statement that could apply to almost anything.
Decide in advance who has the authority to respond
In the moment, deciding who is allowed to post a response, and getting sign-off if needed, wastes time you do not have. Settle it ahead of time, even informally for a small team. Then the response goes out as soon as the wording is right, instead of stalling on a process question.