Slow down effect speed

Hi!

I would like to slow down the animation effect.
Currently, the slide effect can be seen, but it’s way faster than regular user scrolling speed. The fade effect seems to be even faster – the icon just pops up/disappears instantly.

Please advise on a way to slow the effect down to 1s-2s.

Thank you

https://www.ads-software.com/plugins/smooth-scroll-up/