What's fun is if you actually dig into the Atlas repo, it's primarily a pile of NTLite tweaks[1] plus a batch file that automatically applies a bunch of CTT tweaks, particularly the ones around updates and UWP that he explicitly doesn't recommend.[2]

Anyway, Titus also has a guide on making a "custom Windows ISO" using NTLite.[3]

[1]: https://github.com/Atlas-OS/Atlas/blob/main/src/Atlas_20H2.x...

[2]: https://github.com/Atlas-OS/Atlas/blob/main/src/AtlasModules...

[3]: https://christitus.com/ntlite-guide/