Is the reward of more than one voluntary prayer combined when praying two rak'ahs with the intention of multiple voluntary prayers?

Question:
The questioner, Salem from Khamis Mushait, says in this question: Regarding, O Shaykh, combining the sunnah of wudu, the sunnah of the obligatory prayer, and the sunnah of greeting the mosque in two rak'ahs, does one obtain the reward of the six rak'ahs or not?

Answer:
We hope that he obtains this good if he prays two rak'ahs after performing wudu and entering the mosque, intending the sunnah of wudu, the sunnah of greeting, and the rawatib—such as the rawatib of the midday prayer. We hope that Allah combines for him all the good; because the two rak'ahs are prescribed for greeting the mosque, prescribed for wudu, and prescribed for the rawatib before the midday prayer. The rawatib before the midday prayer is four rak'ahs, with taslim from every two rak'ahs. So if he intends it as rawatib, as greeting to the mosque, and as the sunnah of wudu, we hope that Allah combines all of that for him. I do not know of any obstacle to that. Yes.