Can my settings in the menu be saved to every world？it's a bit of a hassle for me to enter commands every time I enter a new world

This is currently not possible without editing the data pack itself and changing the default values in the install function located in /data/spawnanimations/functions/install.mcfunction.

I am however working on a global settings menu for the mod version of this data pack that implements exactly that. I will slowly roll out this feature for my data packs starting with More Mobs in the next weeks.

This feature is now available in v1.9.2 🎉