The ruling on one who broke the fast of Ramadan for an excuse and did not make it up until the second Ramadan entered

My mother was afflicted with an illness in the year (1419 AH) before Ramadan, so she did not fast the entire month of Ramadan. The illness continued with her until approximately (1420 AH), which is Ramadan (1420 AH). A few days before that, she recovered, and Allah helped her, so she fasted the Ramadan of the year (1420 AH). What is the ruling on the Ramadan of (1419 AH) which she did not fast because she was ill?
Can she make it up, or can she not?The questioner: Currently, it is possible, and it is not possible.

The Shaykh: Even if it is one day after another.

The questioner: If she is able to do three days, two days, until it is finished?The Shaykh: It is obligatory for her to do so.