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.
Alien10:
https://assetstore.unity.com/packages/3d/characters/alien10-288826
Alien11:
https://assetstore.unity.com/packages/3d/characters/alien11-288829
Alien 12:
https://assetstore.unity.com/packages/3d/characters/alien-12-288835