Edit VRM Models in Blender, Export the Model to Unity, and Export It as a VRM File - Part ① - FBX File | STYLY
Unity - Manual: Using FBX files in other applications
Blender to Unity: How to Export/Import Models | All3DP
Released this Liquid Wobble effect on Unity Asset Store, but also recorded a step-by-step tutorial so you can create it for free - Tutorial and asset link in comments : r/Unity3D