Help for Aimeos

Hi
In Laravel blade files we can use directives (For example @push('scripts'))
How can I do that in Aimeos templates (Admin or Client) ?
Special syntaxis or something else ?

Thank you !

Only after basket 'Summary' step.

Hi.
In this case I should divide order product, when product quantity is greater then 1.
For example, when quantity is equal to 4, I have to save this product in 4 different rows at database (In each row quantity is equal 1).
How can I implement this ?

Laravel version: 6.20
Aimeos version: 2021.04
PHP version: 7.4

I'm trying to overwrite /ai-payments/lib/custom/src/MShop/Service/Provider/Payment/OmniPay.php to my files.
In which directory I should be overwrite this file ? And path for config files

Laravel version: 6.20
Aimeos version: 2021.04
PHP version: 7.4

By default available 2 addresses: Payment and Delivery.
But there is required only one address.
Can I do it with help config or in another way ?