Wired and Wireless devices can't see each other

I have my router in the basement along with network mesh all over the house. We have the router using "homewifi 2.4g" and "homewifi 5g". When we installed the network mesh, we started using just one called "fullhomewifi". We also have ethernet cables in the walls going all over the house.

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My issue was that even before the mesh network, my ethernet connections and my wifi connections are unable to see the devices of each other.

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For example, if my chromecast is connected via wifi, my ethernet connected PC cannot cast to it.

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Please help!