How to change the background stripes colors
Simply edit the page with Elementor and in the Revolution Slider element, click on the Styles options to locate the color pickers eg: https://d.pr/i/9Qf22m .
How to change the social icons inside the homepage slider.
Try editing the slider, in Revolution Slider plugin and choose the global layer, in which you can find the icons. Here’s a quick recording https://d.pr/v/R2uF5K .
Modify or disable the text scroller in product pages
Here’s a quick video recording how to deal with it https://d.pr/v/YgXbPN .
Basically this is a product page Cover, assigned in Customizer > Page Covers > WooCommerce > Product page . You can edit by accessing Rey theme > Global sections, or when in product page, to hover over Edit with Elementor admin bar menu, and choose to edit the “Product page Cover”.