HealthHub will only display results for swab test done under the NRIC/ FIN number that is tagged to the corresponding Singpass ID. Therefore, you will not be able to view your swab test result on HealthHub if it has been tagged to your passport number.
HealthHub is unable to make any changes to the NRIC/ FIN number that the swab test was registered under. Please contact the relevant institution/ facility where the test was performed for further assistance.