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I wish I could get a decent mesh system. One router isn't enough to cover my house with some of the building materials used.

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If there is any way you can run a few ethernet cables as a backbone, I think it's pretty simple to just setup additional OpenWRT access points on the same SSID to allow client roaming.

Or, with dual-radio routers, setup WDS between the routers using one radio per router and clients on the other, so traffic does not compete for the same channel. I am not sure whether you can still do roaming this way as I've never tried it. But I did use it in the past to brdige wired clients from a secondary router back to the main router over WDS.

Yes, i do this with 3x Archer C7 V2.

I've had good luck with the Mikrotik Audience, but it is not wifi 6 yet (likely coming soon).

If you're in a country that uses steel / concrete to build, unfortunately physics is not so kind towards any signal propagation through that :(

Wood is not either. The inside walls here are 100mm wood(CLT) with gypsum on both sides and the signal drop through 1 wall is big. 2 walls almost kill the signal. I don't have any wifi reception outside the house at all (65m² is floor area) using 1 UI Wifi 6 LR on each floor (with the U6Pro it was even worse).

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