@Sheikhsadi 

TP Link have their own version of this called   One Mesh  that works between routers, extenders, plugs etc etc.  

Ai Mesh has also proven to be unreliable when mixing vendors, yes Asus / DLink and a few others do use AI Mesh, but its really only been effectively implemented by Asus.     When mixing Asus with DLink for example the reviews have been mixed at best, in all ASUS hardware it works fine.

From experience, when dealing with Mesh its always best to stick to one vendor, slight differences in implementation between vendors can cause you heart ache long term.

  @Philbert 

I want to create mesh between same vendor.But Tp link one mesh and Deco mesh system are completely different.We cannot create mesh connection between One mesh and Deco.

So add this features so that we can create a mesh connection between all types of router.There should not  be any differences between Deco and One Mesh.

Make it flexible so that anyone can create a connection between all types of Tp link router.Not onlu between One Mesh and Deco Mesh.

  @Sheikhsadi 

Yes are correct in saying that the Deco and OneMesh cant mix together, however they are aimed at very different segments.

The Deco is a one stop solution, basically you buy packs of  1 2 or 3 nodes and they work as one set.  They work with all types of connections (ADSL, Fibre, 4g etc) and generally offer wifi additionality to ISP hardware.

The OneMesh is really just offering you network expandability in the future.  Namely buy a router now to replace your ISP router, if you need additional repeaters later they can be bought separately for a plug and play system.  

Yes agreed it would be nice if they all worked together, however under the lid they are very different solutions and that is by design.