After disabling it on the UI, your device may still cache the DNS records for a few minutes. There's no immediate feedback on whether disabling adblocking changed anything. It is extremely tedious especially for non-technical users, and adds "tech-support" burden to their technical friend/family who set it up in the first place.
In adguard home you have a switch on/off in the web UI. You can also expose that switch to homeassistant.
And there are some other good ideas in this thread as well for android and ios.