If your hotel booking confirmation shows only one traveller, first check whether the document identifies a lead guest or whether the other travellers are missing from the reservation record entirely. Then compare the document with the destination's current checklist. If every applicant is expected to be named, request a corrected confirmation or arrange a reservation that includes the right guest details before you submit the file.
A lead guest is not always the whole party
Hotel booking systems do not all display guests in the same way. Some confirmations show one lead guest prominently and place other names elsewhere; some show only the person who made the booking. That does not automatically mean the reservation is invalid, but it can make the travel file harder to understand when two or more people are applying together.
Consider a couple applying for a short trip to Prague. They intend to share a room from 12 to 17 June. The hotel confirmation displays only "Alex Morgan," because Alex made the booking, while the visa application belongs to Alex and Jordan Morgan. The dates and property are correct, but a reviewer looking only at the first page may not immediately see that the reservation covers both travellers.
The right response is not to edit the PDF yourself. Check the booking account or contact the issuing provider and ask whether the second guest can be added to the reservation record and confirmation. If the booking channel cannot update the document, decide whether you need a different genuine reservation that records both names.