Website to check retailers for third party loyalty points

Horseradish

Hello everyone,

I was wondering whether there is a website to check a specific retailer for third party (discounts and) loyalty points.

i.e. I shopped on ASOS.com and only found out later that I could have gotten Nectar Points and other discounts for it.

I am aware of voucher code websites but am looking for one website to list retailers and corresponding third party loyalty schemes.

Thank you so much!