Hello,
Theme Options > Header builder > change colors in settings of elements, Theme Options > Styling > change colors of buttons, Theme Options > Footer > Footer styling > Background Color
“YOU MAY ALSO LIKE…” section shows Upsells products, so edit your product and add them – https://prnt.sc/1s9o66e
Try to disable “Static block cache” in Theme options > Speed optimization, and check the Footer then.
Regards