specific product rule for checkout blocks possible ?

We want to display a specific message during checkout, likely using checkout blocks, but I can’t seem to find an option to set up the desired rule.

The rule is quite straightforward: if the cart contains a product with more than 5 units, display a message.

I can’t find a way to do this or even better something to write our own options. Any ideas ? Thanks

So that checkout block app doesn’t have the options you’re looking for?

This is really simply done by a developer. Use Shopify CLI, create a checkout UI extension. Use the cart as input and return a message.