The pack uses Standard Built-In shaders from the Built-In pipeline. This means you can easily upgrade the materials in a couple of clicks to either URP or HDRP.
Before buying, read the technical details and watch the pages and videos for full information.
Monster 07:
https://assetstore.unity.com/packages/3d/characters/monster-07-289018
Monster08:
https://assetstore.unity.com/packages/3d/characters/monster08-289056