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.
Alien05:
https://assetstore.unity.com/packages/3d/characters/alien05-288806
Alien06:
https://assetstore.unity.com/packages/3d/characters/alien06-288812
Alien07:
https://assetstore.unity.com/packages/3d/characters/alien07-288815
Alien08:
https://assetstore.unity.com/packages/3d/characters/alien08-288822
Alien09:
https://assetstore.unity.com/packages/3d/characters/alien09-288823