Why did Mother appear in the dream sick and exhausted, when she passed away after 21 years of suffering from a chronic illness, with patience and seeking reward from God? And does this exhaustion in the dream have any connection to the missed Ramadan fasts that were not made up for on her behalf?

We do not have knowledge of dream interpretation. You should frequently supplicate for your mother for mercy and seek forgiveness for her.

As for what she owes regarding fasting:

- If she broke her fast due to an illness from which there was no hope of recovery, or if she broke her fast due to an illness from which recovery was hoped for, but she neglected to make up the fast until she died, then it is obligatory to feed one poor person for each day she missed. This feeding should be paid from her estate before its distribution. You are also permitted to fast on her behalf.

- If she broke her fast due to an illness from which recovery was hoped for, and she was able to make up the fast but did not, then feeding on her behalf is obligatory.

- If her illness was continuous until her death, and she was unable to make up the fast, then there is nothing due from her.