<div class="type-placeholder" style="font-size: 15px; letter-spacing: -0.3px; color: #abb0b5; white-space: pre-wrap;">
<p class="p1" style="margin: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Menlo; color: #000000; letter-spacing: normal; white-space: normal;">&nbsp;"https://registry.yarnpkg.com/react-native-template-react-native-template-typescript: Not found".
<p class="p1" style="margin: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Menlo; color: #000000; letter-spacing: normal; white-space: normal;">&nbsp;
<p class="p1" style="margin: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Menlo; color: #000000; letter-spacing: normal; white-space: normal;">&nbsp;
<p class="p1" style="margin: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Menlo; color: #000000; letter-spacing: normal; white-space: normal;">&nbsp;
<p class="p1" style="margin: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Menlo; color: #000000; letter-spacing: normal; white-space: normal;"><img src="https://cdn.inflearn.com/public/files/posts/34de8888-56ff-4a1e-8fcc-370fa41cf39c/blob" alt="" />
</div>

yarn 말고 npm으로 해보세요.
그리고 제 깃헙 소스코드로 하셔도 됩니다.

인프런 커뮤니티 질문&답변

npx.. . 부터 막히네요 ㅠ