Ease in/out feature for the timeline

I know Photoshop isn't a program primarily focused on animation but I think a simple ease-in/out feature for the timeline would be greatly beneficial for users who do animate using Photoshop. Currently, I am limited to manually creating keyframes to either slow down or speed up a simple zoom out/in, for example. While, through practice, I have achieved the desired effects by doing it manually, it'd be a huge time saver to have a function that does this for me automatically. I personally am a big fan of Photoshop's timeline feature because it's simple and intuitive for users such as myself who have been using Photoshop for 20+ years. I hope you consider this idea. thank you!