Here the word "we" refers to the writer, Paul, and those traveling with them, but not to the reader. (See: [[rc://en/ta/man/translate/figs-exclusive]])
Paul arrives in Rome as a prisoner but with the freedom to stay in his own place. He calls the local Jews together to explain what has happened to him.
This can be stated in active form. AT: "After we had arrived in Rome, the Roman authorities gave Paul permission to" (See: [[rc://en/ta/man/translate/figs-activepassive]])