E.g. compile the following code:

public class Test {
  void test(String s) {
    if(s instanceof Object obj) {}
  }
}

>"C:\Program Files\Java\jdk-17\bin\javac.exe" --enable-preview --release=17 Test.java
Test.java:3: error: pattern type Object is a subtype of expression type String
    if(s instanceof Object obj) {}
         ^
1 error

Clearly, Object is not a subtype of String. It's vice versa: String is subtype of Object.