In your situation, since you are an inland applicant who responded to the PR Portal 1 email on May 16 but have not yet received Portal 2, and you plan to travel outside Canada from August 31 to September 20, 2025, the best course of action is to be proactive. You should send a follow-up email to the IRCC address that sent you the Portal 1 message, politely reminding them of your pending Portal 2 and informing them about your upcoming travel dates. Mention that you are still in Canada and are hoping to complete the landing process before your departure, but if not possible, you are willing to explore alternatives. If you do not receive Portal 2 soon, and your CoPR is not issued in time for you to receive a PR card before your trip, you will not be able to use a PR card to re-enter Canada. In that case, you have two main options: (1) apply for a Permanent Resident Travel Document (PRTD) from your home country during your trip (if you receive the eCoPR while outside Canada), or (2) delay your travel if the landing is imminent. Unfortunately, requesting a PPR (passport request) to complete landing from outside is not an option for inland applicants, as you must be in Canada for the PR confirmation via the portal. Your best move now is to email IRCC immediately with your travel details and follow up weekly if needed until Portal 2 is issued.