How do I make my android app appear in Ultra Power Saving Mode

How do I use an app in maximum power saving mode?

settings>apps>special access>allow app while data saver on. will display list of apps. just turn on apps you want to allow.

Some samsung devices have an Ultra Power Saving Mode which turns off wifi, turns the screen grayscale and limits usage to a few basic apps.

It however does allow you to add some apps which can then be used. These apps include Facebook and WhatsApp. How do I make my app appear in this list? What changes do I have to make to the app so that it may appear on this list? Or is this list based on a white list maintained by Samsung?