docs(node api): note TLA caveat

Author: privatenumber

docs/node/tsx-require.md

@@ -6,8 +6,9 @@ Use this function for importing TypeScript files in CommonJS mode without adding
 
 Note, the current file path must be passed in as the second argument to resolve the import context.
 
-::: warning Caveat
-`import()` & asynchronous `require()` calls in the loaded files are not enhanced.
+::: warning Caveats
+- `import()` & asynchronous `require()` calls in the loaded files are not enhanced.
+- Because it compiles ESM syntax to run in CommonJS mode, top-level await is not supported
 :::
 
 ## CommonJS usage