PS D:\CS\test> cat src/Test2.java  
record ColoredPoint(int p, int x, String c) { }
record Rectangle(ColoredPoint upperLeft, ColoredPoint lowerRight) { }
public class Test2 {
    void test(Object obj) {
        if (!(obj instanceof Rectangle(_, _))) { }  // ok, expected
        if ((!(obj instanceof Rectangle(_, _)))) { }  // violation expected
        if (obj instanceof (Rectangle(_,_))) { }  // UnnecessaryParentheses around the pattern will not compile
    }

}
PS D:\CS\test> cat config.xml
<?xml version="1.0"?>
<!DOCTYPE module PUBLIC
        "-//Puppy Crawl//DTD Check Configuration 1.3//EN"
        "http://www.puppycrawl.com/dtds/configuration_1_3.dtd">

<module name="Checker">
    <property name="charset" value="UTF-8"/>
    <module name="TreeWalker">
        <module name="UnnecessaryParentheses">

        </module>

    </module>
</module>
PS D:\CS\test> javac src/Test2.java                                              
src\Test2.java:7: error: illegal start of type
        if (obj instanceof (Rectangle(_,_))) { }  // UnnecessaryParentheses around the pattern will not compile
                           ^
1 error
PS D:\CS\test> java  -jar checkstyle-10.17.0-all.jar -c config.xml src/Test2.java
Starting audit...
[ERROR] D:\CS\test\src\Test2.java:6:13: Unnecessary parentheses around expression. [UnnecessaryParentheses]
Audit done.
Checkstyle ends with 1 errors.
PS D:\CS\test>