Is the questioning of the two angels only for this ummah or for all nations??

No File Exists
Check below answers in case you are looking for other related questions:
It is not possible to say that someone is Muslim if they did not utter the Shahaadatayn
If someone does not believe in the Last Day, no faith or righteous deeds will benefit him at all

No File Exists
Related Answers:
Ruling on the one who denies the Hereafter, and how to convince him
Hadith about the conquest of India
The grave is not the final resting place
It is not possible to say that someone is Muslim if they did not utter the Shahaadatayn
If someone does not believe in the Last Day, no faith or righteous deeds will benefit him at all

Recommended answers for you:
Ways of protecting oneself from nightmares and disturbing dreams
She used to do the secret habit and did not do ghusl but she fasted and prayed
Salaat al-tawbah (the prayer of repentance)
Hairstyles
Three questions in the grave