#1. We use the default Woocommerce template and action hooks to customize the single product page. So to customize this page, you will have to override the single-product template in the child-theme, using action hooks to add custom code.
#2. Add the trust badge under the add to cart:
add_action('woocommerce_single_product_summary', 'maximin_fnc_add_trust_badge', 35);
//add your code;
#3. add the number of people is viewing:
Please go to Admin dashboard -> Maximin Theme -> Product Detail tab -> Enable Live View: https://prnt.sc/nmR8WJp67nw1
#3. Setup bundle price:
Step 1: Install this plugin: WPC Product Bundles for WooCommerce
Step 2: Go to edit product -> Select Smart Bundle product -> Tab Bundled Products -> Add product: https://prnt.sc/pVPSNH88gSyX
#4. Translate: please send the admin web account for me, I will check and try to help you.