Tenda Mesh MW6 - DNS issue

Hello, I have Tenda Mesh MW6 one cube -> mesh3f (x4) What problem I have at the moment...my DNS are not being reflected over the network So I login with the Tenda WIFI application and set 1.1.1.1 and 1.0.0.1...but when i go to https://1.1.1.1/help or https://www.dnsleaktest.com/ Still is reading from provided/google DNS Is there some problem or advice? And is there somehow to access inside the router rather than using Tenda WIFI Thank you everyone!