OliveWP supports the default site identity functionality.
Location: Appearance >> Customize >> Site Identity
Upload & change the logo from here.
Site Title & Tagline
Added the site title & tagline from the respective fields.
After uploading the logo, you can enter the fixed size or increase and decrease the width of the logo by moving the range slider as per your need. The height will automatically be set according to the width.
With the help of site icon setting add the favicon icon of the site.