Honda Accord Sedan 2020 Owner's Manual page 175

uuLocking and Unlocking the DoorsuLocking/Unlocking the Doors from the Outside
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Locking/Unlocking the Doors Using a Key
If the lock or unlock button of the remote does not work, use the key instead.
Lock
174
Fully insert the key and turn it.
Unlock
1Locking/Unlocking the Doors Using a Key
When you lock the driver's door with a key, all the
other doors and the fuel fill door lock at the same
time. When unlocking, the driver's door unlocks first.
Turn the key a second time within a few seconds to
unlock the remaining doors.
You can customize the door unlock mode setting.
2 Customized Features P. 372, 383