Could std::atomic

As per the document, which says that [emphasise mine]:

Defined in header

template< class T >

struct atomic;

template< class U >

struct atomic<U*>;

(since C++11)

Defined in header

template< class U >

struct atomicstd::shared_ptr<U>;

template< class U >

struct atomicstd::weak_ptr<U>;

Defined in header <stdatomic.h> (since C++20)

Since the said partial specializations for std::shared<T> is only available with C++20, could std::atomic<std::shared_ptr<Struct Demo>> could be safely used with C++11?

Is there any potential problem that I should be aware of?