I'm not sure where this news is coming from. I read the bill and didn't see anything about citizenship requirements.

Here's the most relevant section:

Eligibility for medical assistance in dying

Critères d’admissibilité relatifs à l’aide médicale à mourir 241.‍2 (1) A person may receive medical assistance in dying only if they meet all of the following criteria: (a) they are eligible — or, but for any applicable minimum period of residence or waiting period, would be eligible — for health services funded by a government in Canada; (b) they are at least 18 years of age and capable of making decisions with respect to their health; (c) they have a grievous and irremediable medical condition; (d) they have made a voluntary request for medical assistance in dying that, in particular, was not made as a result of external pressure; and (e) they give informed consent to receive medical assistance in dying.

Grievous and irremediable medical condition

Problèmes de santé graves et irrémédiables (2) A person has a grievous and irremediable medical condition if (a) they have a serious and incurable illness, disease or disability; (b) they are in an advanced state of irreversible decline in capability; (c) that illness, disease or disability or that state of decline causes them enduring physical or psychological suffering that is intolerable to them and that cannot be relieved under conditions that they consider acceptable; and (d) their natural death has become reasonably foreseeable, taking into account all of their medical circumstances, without a prognosis necessarily having been made as to the specific length of time that they have remaining.