📝 fix docs (#5217)

docs/mkdocs/docs/api/basic_json/get.md

@@ -88,6 +88,11 @@ constexpr const PointerType get_ptr() const noexcept;
 
 Depends on what `json_serializer<ValueType>` `from_json()` method throws
 
+## Complexity
+
+Depends on the `json_serializer<ValueType>::from_json()` implementation for overloads (1) and (2); constant for
+overload (3).
+
 ## Notes
 
 !!! danger "Undefined behavior for pointers"
@@ -144,6 +149,13 @@ Depends on what `json_serializer<ValueType>` `from_json()` method throws
     --8<-- "examples/get__PointerType.output"
     ```
 
+## See also
+
+- [get_to](get_to.md) convert and write into a passed value
+- [get_ptr](get_ptr.md) get a pointer to the stored value
+- [get_ref](get_ref.md) get a reference to the stored value
+- [operator ValueType](operator_ValueType.md) get a value via implicit conversion
+
 ## Version history
 
 1. Since version 2.1.0.