1 router + 1 wired AC configuration with 1 SSID

[docdam]

I actually use 1 tp-link archer c7 as router and 1 older router as AP with the same SSID.
I realized that sometime I have some connection problem when device switch from 2.4ghz to 5ghz band. Tp-link customer care says it's because the router doesn't support band steering.

So i'd like to change router... About the access point, is it possible to have one that communicate with router and support band steering to create 1 unique wifi SSID?
I read about "Smart connect" in some router to support band steering as AP
If I bought an ASUS router can I connect an access point or another router with AiMesh, or it just work wireless?

Thanks for the help

 

[L&LD]

You can use a second router as an AP with any other router.

How To Convert a Wireless Router into an Access Point - SmallNetBuilder

The client devices have the most control over how easily/seamlessly they switch between APs'. The router can 'suggest', but it can't force a device to do anything.

 

[docdam]

I read that having a system like aimesh or unifi ubiquity there could be better management of the seamless connection. It is not true?

 

[L&LD]

That is marketing. 'True' or not depends on the devices used to 'prove' it.