2dognight Google Camera required GSF (Google Services Framework) to work in the past, which changed in the second to last release. You can now install it without any of the 3 Google apps.
That said, some functionality, like the AR features will require Play Services.
The latest update makes it so Google Camera can take advantage of the direct GXP access on Pixel 7 / 7 Pro (it already had direct TPU access, and that is also relevant to earlier Pixels instead of just 7th gen ones). Direct TPU/GXP access for these apps is now enabled by default, and can be optionally disabled for attack surface reduction.
The apps having this access doesn't add more features, but it does significantly increase the performance of these apps.
All of these changes are now documented, so I would also recommend reading through this section: