There are several ways to open the trunk on a Camry. It seems that the most convenient way is the least known. 2018 2019 2020 2021 and 2022 Camrys are like this but others have the feature as well. It is not exclusive to these vehicles but these are the ones I chose to use. Also there is a key open on most on the left side opposite of the button. Also note that all smart key systems have this from what I can tell.