Using Outlook for Android for personal email and calendar management
Hi!
If you want larger list items with more spacing, Outlook for Android has a display density option. Open Outlook > Tap the profile icon in the top-left corner > Gear icon > Display & Appearance > Density > Choose between Roomy, Cozy, and Compact modes.
If you are referring to larger text, you need to change that in your phone's settings, as Outlook does not control this. The location of this setting varies depending on the phone model, operating system version, etc., but you can search for it using the search bar in your Settings.