The type of the children prop in FlagsmithContextType doesn't align with the type normally used for children props which results in having to wrap an actual children prop used inside a FlagsmithProvider with a fragment to make it work without TS errors. Perhaps the type could be changed from ReactElement | ReactElement[] to simply ReactNode, which would be the same as the PropsWithChildren generic type provided by React.

// Example of error
type FeatureFlagProviderType = {
  serverState: IState;
};

export const FeatureFlagProvider = ({
  serverState,
  children, // ReactNode
}: PropsWithChildren<FeatureFlagProviderType>) => {
  const flagsmithInstance = useRef(createFlagsmithInstance());
  return (
    <FlagsmithProvider
      flagsmith={flagsmithInstance.current}
      serverState={serverState}
    >
      {children}
    </FlagsmithProvider>
  );
};

However, by wrapping children with a fragment or something else, there are no issues.

Perhaps I'm missing something, but is there any special reasoning behind using ReactElement | ReactElement[] for children?