A missing achievement at the Routing Power checkpoint can be a known rare issue. The launch known-issue guidance explicitly lists an achievement in that checkpoint sometimes failing to be awarded. If you completed the relevant gameplay but received no award, that alone does not prove you wired the puzzle incorrectly.
There is no confirmed guaranteed fix, required replay count, or reliable host-switch method in the available guidance. Checkpoint recovery can restore a blocked session, but it is not documented as an achievement repair.
Separate progress from the award
Guide diagram: replaying a checkpoint does not guarantee the missing award.
Consider two observations independently: whether the game allowed you to progress, and whether the achievement was recorded. A puzzle that remains unfinished is a different problem from a completed section with no award.
If you are still stuck at the wiring, investigate the route and the room state. If you have already moved on and the award is absent, do not automatically replace your successful solution with a different cable sequence. The rare awarding issue can explain that mismatch without proving any new puzzle requirement.
The known-issue description does not identify a specific hidden trigger, a platform-specific workaround, or a particular achievement title beyond its connection to Routing Power. This guide therefore does not attach an unverified name, icon, or extra condition to the affected award.
What a checkpoint replay can reasonably do
The general softlock instructions allow the host to select the last checkpoint through the main menu: Change, then Start New Journey, followed by manually selecting the checkpoint.
That is a way to return to a playable point when the session is blocked. It does not promise to retroactively grant the missing award. If you choose to replay a section to see whether it registers, treat the result as an experiment rather than a guaranteed repair.
Repeatedly restarting after the same outcome has no documented success rate. There is also no supported instruction here to delete a save, finish the entire game again, use a different account, or change platforms for this issue. Avoid sacrificing progress to an unverified requirement.
Keep expectations tied to an actual fix
The launch guidance places this issue among problems intended for a future patch. That establishes that it is recognized; it does not establish that a fix has already shipped, that older completions will be recognized later, or that every missing award has this cause.
If the checkpoint is playable and your only problem is the absent award, continuing the adventure is separate from deciding whether to replay for achievements. Keep track of the affected checkpoint and what happened so you can assess any later fix against your actual case, instead of assuming a successful puzzle must always produce the notification immediately.