No, it shouldn't affect anything. DNS resolver gets better... If this doesn't help you can always revert the setting.

To change your DNS to 8.8.8.8 on Android, use Private DNS for all networks (Android 9+) via Settings > Network & Internet > Private DNS > "dns.google", or change Wi-Fi settings manually by setting IP settings to "Static" and entering 8.8.8.8.
Private DNS (Best for Android 9+)
This method changes DNS for both Wi-Fi and mobile data.
Go to Settings.
Tap Network & internet (or "Connections").
Select Private DNS.
Choose Private DNS provider hostname.
Type: dns.google (or 8.8.8.8 depending on phone model).
Tap Save.
Restart Ecency app...