iiuc,
what you need to change your status to a spouse of a foreign resident is an authenticated document to prove your marriage. They dont accept Taiwanese martiage certificate, though. so, if the marriage is registered in a country, it may suffice.
no, an interview at TECO should not be necessary, if the marriage is between two foreigners.
when a foreigner and a cituzen register their marriage in Taiwan, if the foreign spouse from SEA has an APRC, the interview is not required too, iirc.