I would like to suggest inclusion of my new mod, Toast Manager, which allows users to control which types of toasts will appear on-screen, as well as changing their appearance. By default, it blocks tutorial and recipe toasts and makes others appear with a translucent background but that can be extended to system toasts or modded toasts as well.
By including this mod it would also allow AOF players to configure how they want their toasts to appear, such as with an invisible background so they aren't as intrusive.

If you've ever used the Forge mod Toast Control, this mod includes every feature that mod has as well.

Here's an example image:

And here's where the mod can be downloaded:
https://www.curseforge.com/minecraft/mc-mods/toast-manager