Questions & Answers about Disculpe, he llegado tarde.
He llegado is the present perfect: I have arrived. In Spain, this tense is very commonly used for actions connected to the present moment.
Here, the speaker is apologizing for something that has just happened or is still relevant now: they are late right now.
Compare:
- He llegado tarde = I’ve arrived late / I’m late; I arrived late
- Llegué tarde = I arrived late
In many parts of Spain, he llegado tarde sounds very natural in this kind of immediate situation.