add slide delete emails on gmail
How to change the swipe gesture from Archive to Delete in Gmail on iPhone
These steps will allow you to add delete as one of the swipe options when you swipe from right ot left or left to right in the Gmail app on iPhone.
-> Go to the Gmail app
-> Select the three lines in the top left corner
-> Scroll down to Settings
-> Tap on the 'Mail Swipe Actions' option
-> Tap on Left Swipe or Right Swipe depending on your preference
-> Select Bin
-> Tap on Left Swipe or Right Swipe
-> Select the action you want
-> Press the back arrow in the top left corner
-> Tap on the 'x' in the top left corner to exit the settings menu and return to your Gmail inbox