Hello,
Thanks for understanding.
About point 4: We found that yith bundled plugin which you use has own shortcodes to show list of bundled products so we added [bundled_items] and [bundle_add_to_cart] shortcodes to Single Product builder -> Html block 01 and Html block 02 -> https://prnt.sc/2gkk-iAbuLtD
Also we added for you custom css that was on your previous web-site ( https://prnt.sc/q8HP4ozEnTfI )
Please, check now
Regards