The law of causality is the most fundamental law in the universe, and the life and death of any life (including Buddha and Bodhisattva) will be restricted by the law of causality.
How a person lives and dies is related to his karma and has nothing to do with enlightenment. If a person creates the cause of sudden death (bad karma), no matter how enlightened he is, he will certainly suffer the result of sudden death. For him, sudden death is inevitable.
However, the sudden death of enlightened people and the sudden death of ordinary people are two completely different concepts.
The sudden death of ordinary people is unpredictable, helpless, inevitable and forced.
Sudden death is a disaster, a terrible thing and a bad result for an ordinary person.
Any truly enlightened person knows his own life and death like the back of his hand. Sudden death is the enlightened person's own choice. As an enlightened man, he is fully capable of avoiding violent death, but he will not do so. He will take the initiative to eliminate his bad karma.
For a very insightful person, sudden death means eliminating karma.
Anyone who is truly enlightened will never miss any opportunity to eliminate bad karma.
For a practitioner who comes and goes freely and fully understands, death (including sudden death, of course) is just a change of better clothes, so they will not deliberately avoid sudden death.
Theoretically, only those who do not commit violent death or whose evil deeds have been exhausted can avoid the consequences of violent death.