Go to settings, connections, more connection settings and tap on more connection settings and tap on private dns. Then tap on server host name and type in dns.adguard.com.
If this is about that new Instabridge thing which has an ad widget on the homescreen, this worked for me:
Go to settings. Search "Instabridge" > choose Instabridge App Info > under Defaults choose Home screen > One UI Home.
For me after upgrading to One UI 6, it looks like Instabridge completely took over the homescreen. All my app organization was gone and it had pop up ads. After making this change, it is back to exactly how it was before the upgrade, all app folders still there and everything.
