Hi There,
Thanks for posting in.
Please go to Appearance > Customize > Header > Logo and Navigation > Layout: Choose inline if you want the logo on the left side of the menu. Stacked option means that the logo is on top of the menu. Even inline, it will hold a place on the row so the menu will not be centered. After setting this settings, please share your site URL so we can how we can center the menu even if the logo is on the left side.
Hope this helps.