Skill gem link with support question

Hello, I am hoping someone may be knoughledgeable in the game and be able to answer a question on Gems with support. I am working on a build and the build asks:

Eternal Blessing (red)
-Frostblink (blue)
Grace (green)

The frostblink is showing to be linked to Eternal Blessing. The thing that confuses me is that Eternal Blessing is a support gem, frost blink is a skill. It could be reversed, but the game tells me that eternal blessing isn’t compatible with frostblink. It is compatible with Grace. But the build shows it different. Could a support gem still provide benefits even if not linking with “supported gem”?

https://pobb.in/xiq_BKWKJp7X

I want to say that I would need to change to link with Grace so it would “highlight” as it is supported but not sure.

Thank you

Sometimes people just throw gems on let’s say gloves and boots and the support gems only effect like one or two of the skills. It’s probably just a mistake from a lazy build guide dude ;)