I’m in the process of selecting a Book Publishing Company, and editing services are a top priority for me. How in-depth is the editing process at different publishers?

Do publishing companies typically offer both developmental and copyediting, or is it something authors need to seek separately? Also, how much influence can authors have during the editing phase? What should I look for to ensure the editing is of the highest quality?

I’d appreciate hearing about your experiences and advice on choosing the right publisher for top-notch editing services. Thanks!