Not really, sculpting or using physics are the main ones.
Sculpting is pretty fast for cases like this, you can prob do that in a minute or two. Downside is that you have to redo it with every pose.
Physics are more universal where you set-up a low-poly cage around the breasts with soft-body physics, and a low poly arm-cage as collision object. This takes some more time to set-up, but has the plus side that it isn't depended on the pose. I'm sure there is a tutorial on how to do this in the Blender NSFW discord:
You must be registered to see the links