Why auto generated config file in the git repository?

I'm new to Linux sources. I found next file https://gitlab.postmarketos.org/postmarketOS/pmaports/-/blob/master/device/testing/linux-postmarketos-qcom-sc7280/config-postmarketos-qcom-sc7280.aarch64

It seems a config file.

At the begging of file it mentioned Automatically generated file; DO NOT EDIT.

Based on my web development experience auto generated files usually not under the git.

May anyone share ideas why it this file in the git?