Soul browser with NextDNS

Hello, a few days ago I managed to find the "Soul browser" for Android phones, and I noticed it has quite a few useful features. The first thing I wanted to change was to set up "NextDNS" on "Soul browser" to see if I could get a DOH result, because with the same settings for "Brave/Vivaldi/Firefox", I get a DOT result on "Soul browser". I dug a bit deeper into how to get the DOH result and found that it can be achieved through the "Intra" or "RethinkDNS" apps for Android phones as well. In these apps, you literally enter the same details as you would for the browser’s link on the phone, and it seems to change the "Private DNS provider hostname" for the entire phone. Currently, on the phone, Private DNS is disabled, and the settings work through the RethinkDNS app.

I'm curious if there's a way to set up the settings just like in Brave/Vivaldi/Firefox for "Soul browser", but without using additional apps like "RethinkDNS"? And, if I leave "RethinkDNS" running, will the phone get DOH for all other apps? I really like this "Soul browser", and I'd like to give it some time to see how it performs. If it turns out to be really good, I might switch over from the other browsers.

Thanks in advance!