with Taiwanese Mandarin I mean 臺灣國語, also called 華語.
All I find online, given how relevant China is today is the simplified script and PRC vocabulary, not the vocabulary used in Taiwan.
Even translators advertised as offering Taiwanese Mandarin translate into Chinese Mandarin.
That’s interesting because I usually have the opposite problem.
The more complex characters are generally called “Traditional Chinese” in English if that helps