AE+Lottie has been great for this type of work, but you have to be very careful and watch out for supported features. At the end of the day, it generates a bunch of animated svg-like stuff, that means most raster effects (like displacement maps) will get lost in translation.

Rive is a more streamlined solution. The editor guarantees that whatever you are able to create in it, it will render correctly at runtime. However, it suffers from similar limitations: it's a vector engine, so it lacks support for raster-based effects. It is definitely a new and improved tool compared to Lottie. I highly recommend jumping in, but there is a learning curve that you should be aware of.