Preview HTML from first wizard step?

    protected function getSteps(): array
    {
        return [
            Step::make('Mail Template')
                ->schema([
                    Section::make()->schema(EmailResource::getFormSchema())->columns(),
                ]),

            Step::make('Mail Preview')

                ->schema([
                    Section::make()->schema(EmailResource::getFormSchema('preview')),
                ]),
        ];
    }