SangoKaku - 5 months ago
Note, I have never owned a Serissa Foetida Variegata, so I can only go by what I have read so far. If it were me, I would find a nice place for it and let it be until it regrew leaves. Since dropping all of its leaves is common, I would not worry too much about that. As long as it is not over/under watered, the leaves should begin to grow back. Once it has decided to drop leaves, thats just what it does.
More importantly, as long as you have good roots, they are not soaking in standing water and they are not completely dried out, it then becomes a matter of time. The watering routine you mentioned above sounds fine. This all could have been triggered by location change, lighting change, even nutrient change if you re-potted. Perhaps it just needs time to stabilize and get comfortable with the new normal.