Hello,
1) I checked your site using iPad and did not face any problems
https://prnt.sc/1v5nmdg
https://prnt.sc/1v5npob
2) Slider works fine from our side if we check your site.
3) What render issues do you mean? I don’t see anything https://prnt.sc/1v5nxxz
4) Read this post about revolution slider optimization https://wpmudev.com/blog/optimize-slider-revolution-wordpress/
5) Could you, please, tell me what exactly is wrong here https://recordit.co/hpMEx1fGGh because shop page and single product page are ok for me.
6) It’s because plugin adds the position absolute for the images. Add the below code to Custom CSS to align them correctly
.woocommerce-checkout #payment ul.payment_methods li .card-brand-icons {
position: relative;
}
Regards