[devoutsalsa]

There were no objects before the CMBR. The universe was so hot that atoms couldn't even form. Once it cooled to the point where hydrogen atoms came into existence, the CMBR became possible. I'm talking at the limits of my knowledge, so allow me to refer you to this video by Fermilab that's pretty good.

What is the Cosmic Microwave Background? -- https://youtu.be/AYFDN2DSVgc

[TheCapeGreek]

I think OP's question related to the observable universe vs what is beyond. We see the CMB (and thus our limit of light) only to a point, but that doesn't mean there's nothing beyond that - otherwise we'd be the literal center of the universe (I recall an old minutephysics video[0] on this).

[0] https://www.youtube.com/watch?v=W4c-gX9MT1Q

[cyberax]

We ARE the center of the universe. Just like any other point!