I saw the post on anarchists or communist rejecting all liberal institutions. In that I see the point in the removal of the education system of a respective country, but it also seems to me that there would need to be a replacement. As such K was wondering where to look at proposals on how it ought to be replaced

I’m not sure what you mean by ‘liberal institutions’.

Anarchists generally want to abolish institutions is social control, especially centralized, forced and hierarchical control and replace them with voluntary decentralized non-hierarchial community organizing.

So they’d want to abolish centralized parliaments and replace them with
voluntary non-hierarchial

local and community-based decisionmaking.

They’d want to abolish schools and replace them with
voluntary non-hierarchial

community based education as well as spontaneous learning-by-doing-with-others.

They’d want to abolish nuclear families and replace them with
voluntary non-hierarchial

community based care as well as spontaneous
learning-by-living-with-others.

They’d want to abolish businesses and replace them with voluntary non-hierarchial community workplaces as well as spontaneous creating-through-recreation.

They’d want to abolish courts and replace them with non-hierarchial community led transformative justice practices as well as preventing harmful behavior by living with others in a way where everyone’s needs are met and everyone is cared for and heard.

They’d want to abolish centralized media and replace them with
non-hierarchial community based information sharing.

And so on.

If you want to learn about those things, go read some Anarchism 101! I recommend Anarchy Works.