Showing product color variants as seperate products on collection page - but now filter doesnt work?

Hi,

I have made a screen recording explaining of my issue:
https://sharing.clickup.com/clip/p/t20458489/4099c70a-ee5d-470f-be49-75b4e3f412db/screen-recording-2…

I have a developer who made all my product color variants display as individual products on my collections page - Great!

BUT, when i try to use the filter option “color” and choose to show fx only “Blue”, all the variants keeps showing, and nothing happens.

The website is not done yet, so i only have a preview link for you guys:

When you click “Shop now” on the banner, on the home page, you will get navigation to a collection, containing the product shown within the screen recording.

I have some doubts about the talent of my developer, so i just want to know if guys will say the same as he does.

Any idea how to fix this?

Thank you for your time!