Problem with Money Off promotions

I'm running a multi-buy promotion on my most popular products to try and get them to also buy my less popular products - if they buy any of my main products they get 10% off any of 5 other products if bought together.

On seller central > manage promotions it says the promotions are active, and it's started using up the budget and it says there have been orders. But when I go onto any of the listings I can't actually see anything.

When I did the same thing last year it used to flag the promotion quite prominently near the top of the better selling listing (so was giving my less popular products exposure), but now I can't see anything at all about the promotion (even when viewing the listing logged out of my Amazon account). Am I missing something?

Or am I just giving discount to people who already added both products to their basket anyway, without actually getting any extra exposure for my less popular products?

If you want to see what I mean, this is one of the main products: https://www.amazon.co.uk/dp/B09GF5PGT2 and if they buy this they will get 10% off this product if bought together https://www.amazon.co.uk/dp/B0BML57MQJ

Thanks in advance!