Recovery from this is disputed and appears to depend on the amount of time that the penis has been confined. Most reports suggest that it would take years to reach this state and even then, a longish period of ‘normal’ erection activity would restore most, if not all, the previous dimensions – dependant of the age and general state of health.
I came across this information (attached) from what appears to be a specialist in the field if not an actual scientist.
I did see a TikTok video where a Dr mentioned growers wearing a cage could cause micro fractures as the penis grows and shrinks which may result in PD.