This pack makes sunflowers follow the sun, just like real life! The only problems are: Using the pack in a moment of the day that is not on tick 0 to 50 will make the sunflowers desync Refreshing the pack will reset it, so it desyncs Exiting a world will reset the pack so it does the same thing
So it's better to add the pack to the resource pack list BEFORE entering a new world you'll have to create if you really want it to work well.
I want to make this work without if desync-ing, i might actually transform this into a datapack
Also if you still liked the old Sunflower item texture, you can still get it by renaming it to "Sunflollow" (with Optifine or CIT resewn) or use this command (that doesn't need optifine):
/give @s minecraft:sunflower{CustomModelData:10}
If you want to see a sunflower in action, here it is https://imgur.com/a/mUCoQIr