I would imagine constituent services in Taiwan would be similar to Canada—that they may also assist people who are not citizens or permanent residents. At least, that has been my experience here in Canada.
Earlier this year, I was helping the young daughter of a Taiwanese friend. She had been studying in Canada for several years and held a valid Canadian study permit. She had also travelled back and forth between Taiwan and Canada many times without any problems. Then, suddenly, she was denied boarding at Taoyuan Airport because the airline said there was some kind of issue with her eTA. We had no idea what had happened.
We initially thought it might simply be an eTA application error, so we tried applying again. After three days, however, we still had no idea whether the new application had been approved. In the meantime, she still could not board a flight back to Canada.
At that point, I contacted my local Member of Parliament for help. Obviously, she was a Taiwanese citizen with a Canadian study permit—not a Canadian citizen or permanent resident. Nevertheless, my MP’s office was willing to assist us.
As it turned out, this became a real case of 塞翁失馬,焉知非福—a blessing in disguise.
With the MP’s assistance, we discovered that the problem involved some unexpected bureaucratic red tape. Somehow, this young woman already had Canadian permanent resident status, although neither she nor her mother had any idea about it. Eventually, we had to hire an immigration lawyer to sort everything out.
Long story short, when she was a minor, her biological father had apparently applied for Canadian permanent residence for her many years ago. The application was approved, but for whatever reason, he never ended up moving to Canada. Her mother later remarried, and apparently no one knew that this PR status had ever been granted.
So, in the end, she discovered that she was actually already a Canadian permanent resident—which could potentially save her a tremendous amount of money in international tuition fees.
But honestly, without the help of my MP’s office, I don’t think we would have even known where to start looking. That experience is why I would hope that constituent service in Taiwan is also available to people who live in a legislator’s constituency or otherwise have a legitimate connection to the issue, even if they are not Taiwanese citizens or permanent residents.