I used Airalo Asialink when I was in Taiwan. It was LTE only, and I had a problem with one of the supported operators (Chunghwa Mobile or Taiwan Mobile, don't remember). The speed was absolutely horrible, I wouldn't even use Google Maps. When I manually selected the other mobile operator, it worked again. However, I had no issues in HK.
It is always better when you can choose between several mobile operators.

Check Holafly or Nomad. They may already supportsuppoMind you, as it all be roaming, it is still 4G between operators 😁