Nitpick: It is called "final" in Java, but your point stands. As I understand, C++ borrowed their "final" keyword from Java/C#. I'm not trolling when I write that last sentence. That is something that has really changed about C+ since the C++-11 committee was started -- and continues. When people write language / library proposals, they now regularly survey the landscape and talk about their experiences with other languages / libraries.
Technically Java has both `final` and `sealed`, and the distinction between the two is complicated, but `sealed` is the more powerful/capable/adjustable of the two. But the rest of your point stands and it does seem useful that C++ is paying more attention to the large ecosystems of its descendant languages and other relatives.
> While true that all classes can be inherited
That's what the 'final' keyword in C++ is for: https://en.cppreference.com/w/cpp/language/final.html
"Specifies that a virtual function cannot be overridden in a derived class, or that a class cannot be derived from."