I only use my Galaxy for phone and very occasional surfing so my setup is bare bones. Luckily I have Pie so I have Cloudfare DNS over HTTPS without using their 188.8.131.52 app. Seems to be working as intended.
You may use Adguard DNS as the DoH instead. A lot of ads and tracker would be blocked at DNS level then. Also there's NextDNS for which you'll have to add filter list first like your adblocker then can use that anywhere. I'm using NextDNS on my Android 9 device.Luckily I have Pie so I have Cloudfare DNS over HTTPS