DEMO: https://youtu.be/yYuuRe2wqAM

Currently blender does not instance modifiers together with object instances let alone allow you to instance same modifiers across different objects.
nModifiers let you save your favorite modifiers to a quick access bar, save modifiers presets, instance modifiers across different meshes and update them live when tweaking values on one of the meshes.

Features:

• Live Modifier Sync: Edit your modifier stack that automatically updates across all linked instances

• Performance Mode: Toggle to prevent lag in heavy scenes

• Favorite Modifiers: Pin your most-used modifiers for quick access

• Modifier Presets: Save full modifier chains to reuse with one click

• Batch Operations: Select all linked instances, instance stacks across multiple objects, or clear modifier stacks in one click