Hello,

01. You can customize which of these locations show the Google Pay button by going to Payments > Settings and then clicking the Customize link for Apple Pay / Google Pay in the Express Checkouts section. Once there, you can change, Where the Google Pay button shows up.

02. Please add this code to the Theme Settings > Custom CSS > Global:

.wd-free-progress-bar .progress-bar {
  max-width: 350px !important;
}

Best Regards.