# Optidef package latex specify supremum instead of maximize

I am trying to create an optimzation problem which looks like this:

I use Optidef for all my optimization problems but should I be using regular align environment for this?

With the \underset macro from amsmath:
\documentclass[border=2mm]{standalone}
$\underset{y\geq0}{\sup\psi(y)}$

No need for align or the like.