Any method to add effect to default PBR material?

I am currently creating a vertex shader to make texture dissolve from one to another using height map. I would like to make this supporting PBR workflow, is there any solution that i can use? I am not sure whether to write PBR shader by myself or I can simply “insert” this type of shader to a existing PBR material?

If possible, please help me how to “insert” this shader to a existing PBR material.
7922503--1011106--upload_2022-2-24_14-35-49.png

How can i achieve this in both built-in render pipeline and SRP?