From type/Metamodel/MethodContainer

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method methods($obj, :$all, :$local)

Returns a list of public methods available on the class (which includes methods from superclasses and roles). By default this stops at the classes Cool, Any or Mu; to really get all methods, use the :all adverb. If :local is set, only methods declared directly in the class are returned.

class A {
    method x() { };
}
 
say A.^methods();                   # x 
say A.^methods(:all);               # x infinite defined ...

The returned list contains objects of type Method, which you can use to introspect their signatures and call them.

Some introspection method-look-alikes like WHAT will not show up, although they are present in any Raku object. They are handled at the grammar level and will likely remain so for bootstrap reasons.