The overarching goal of communism is for laborers to own the means of production instead of an owning/capitalist class.

No, the overarching goal of communism is to create a stateless, classless and moneyless society.

Employee owned businesses are the realization of communism within a capitalist society.

No. At best, you could say that coops are a proto-socialist element within a capitalist society. Firstly, I am using the term "socialist" as separate from "communist" here, and secondly, a proto-socialist element is a very different thing from an enclave of socialism within a capitalist world.

The simple problem is that capital is capital. A capital is a self-reproducing social relation that competes with other capitals in a sort of evolution by natural/sexual/artificial selection on the markets. The problem is capital itself, and the solution is to destroy capital. Creating a new type of capital that is less destructive, or one that operates under less destructive modes is fine for countries where development has not reached to the point that they can directly gun towards communism. However, for advanced, and especially late-stage capitalist economies, the task is not to pursue further development of market forces, because market forces have already matured. The task is to eliminate market forces (although this may take time).

Coops may give a more equal distribution of wealth amongst the workers, but the aim of the communists is to abolish wealth, because the very meaning of wealth is that a private individual gets to command the labor of others. That is the fundamental social relation that money embodies and facilitates. The only way to remove the power to exploit other people's labor is to remove the ability to command labor. But if you cannot command labor, then money becomes worthless and your ownership of the coop doesn't mean anything.

Are organizations focusing on this and I just don’t know about it?

Yes. A quick google search shows examples such as the international labor organisation

If not, what obstacles are there that would hinder this approach to increasing the share labor collective ownership?

Part of the fundamental problem is just that the bourgeois class is not stupid. They want exploitable workers and profits. If you deprive them of that, prepare to face their wrath as they abandon all pretenses of human rights or fairness or the sanctity of markets.