In يَرْزُقُنَا اللّٰهُ, the ending نَا means “us.”
● Verb: يَرْزُقُ — provides
● Attached object pronoun: نَا — us
● Subject: اللّٰهُ — Allah
Idiomatic English: Allah provides for us.
The attached pronoun belongs to the verb; do not treat it as a separate subject.