Could not create vertical button navigation

Hello everyone, i have the attached interface to execute in ionic but i m struggling to implement the 2 buttons on the left.
I managed to make the buttons vertical but i could not find a way to divide my screen into the left button area, and the main content.
Methods tried with no success : ion-split-pane
-ion grid using 1 col for buttons ( couldn’t reserve full page height)
-flipping ion-segment to vertical
I would appreciate the help!!!