OutlineFx

Simplified screen-space outline for Unity Urp.
Supports transparency and does not require the use of special materials.
Includes customization options such as:

• Edge softness
• Shape fill
• Mask with its animation

The outline effect is achieved in the following way: selected objects are first rendered into a texture.
Then, the edges of objects on this texture are drawn over the main texture.
Optionally, the outline can be drawn in a separate texture and then used through a shader.

Usage

Unity PackageManager url

https://github.com/NullTale/OutlineFx.git

Basically, all you need to do is add OutlineFxFeature to the Urp Renderer
and OutlineFx script to the object you want to outline.

That's it, the outline settings are common for all objects,
you can also customize the outline shape, fill and its texture.