Hello,

1- Under the Mega Electronics demo, there is a Layout enabled for the Single Product page so you need to go to Dashboard > Layouts > there edit the Single Product Layout > in that you can find a Inner Section added with Image or SVG, Section Title and Text Block elements > there you can edit these elements to configure this: https://snipboard.io/3TMRlm.jpg

2 & 4- As we mentioned above that a Custom Single Product Layout is enabled in this new Demo, so you will find all these mentioned things in that Layout to change and configure accordingly: https://snipboard.io/5lpkWO.jpg

3- Regarding the Reviews element, it is also added under the Custom Product Layout so you can find some options there to configure: https://snipboard.io/0hP4ic.jpg

Further, you can more options related to Reviews under the Dashboard > Theme Settings > Single Product > Reviews: https://snipboard.io/1BiIyw.jpg

Moreover, you can read more about the Layout Builder here: https://xtemos.com/docs-topic/woodmart-woocommerce-layout-builder/

Best Regards.