As-Salaamu Alaykum, I found out that I have to make up multiple fasts from previous Ramadans due to the secret habit, even though I wasn’t aware at the time that they nullified my fast. Can I combine my intention to fast these days with the 6 days of shawwal? If not, then which should I prioritize?

Ustadh AbdulAziz al-Haqqan

Imam Ibn Uthaymeen mentioned that you don't need to make them up. He also added if you wanted to make them up just in case then you can do so as well because of the different views regarding it.