https://www.cnet.com/news/wi-fi-easymesh-wants-to-boost-mesh-hardware-compatibility/

Mesh networks use multiple routers and satellites to boost Wi-Fi performance across large areas, such as big houses. Today, though, you generally have to buy in to a single system. You can't seamlessly use a Linksys Velop mesh on the same network as a Netgear Orbi mesh, for example. 

The Wi-Fi Alliance, which manages the 802.11 Wi-Fi standards and more, has introduced an EasyMesh standard and certification to facilitate networks that talk, self-organize and optimize device attachment. In other words, allow access points from different manufacturers to negotiate and automatically jump your iPad to the access point that will give you the best performance as you move from room to room.