How do I make this hover effect?

Hi guys, I’ve been trying to recreate this button hover effect but I just can’t seem to get it working, does anyone know how to make this?

Yummygum - Digital agency from Amsterdam - when you hover over start a project or menu in the header, it looks like it’s creating a circle that scales then scales back to 0 on the position of the mouseleave.

I feel like the timing of scale is uneven too, that it starts fast growing and is slower shrinking.

I just can’t seem to get it right.

Has anyone made something like this before? I’d appreciate any help in making this as it’s a really cool effect.

Kind regards