Thanks for this, it's great. It works almost flawlessly, sometimes the default lockscreen will appear for split second, but it's not an issue. A couple of things I noticed, sometimes I see the notification that I have chatheads on from Facebook Messenger, not sure which one to turn off so that doesn't appear at all, I'll screenshot it next time I see it, if it reappears. Also on Facebook Messenger the actual notification has Like, Mute and Reply options while the notification on Ava only shows Like.
Is there a chance that we can choose to have the widgets on the main page, along with the notifications. on tall phones like the S9+, I believe they can fit decently.
EDIT: Here's a screenshot of the forementioned Messenger notification https://i.imgur.com/QB6FIg2.jpg