Certain apps don't completely work on Android but works on iPhone

I have certain apps such as bank apps or shopping apps where there's certain features within the app does not load on Android. There is always some sort of error like "Can't connect at this time, please try again later". I have confirmed turning off the app or switching the private DNS to auto instead of custom allows the app and feature to work like usual. A friend of mine also uses NextDNS and we have similar configurations setup other than they having more blocklists enabled compared to myself. Their allowlist is also not allowing the problematic apps in question. They have an iPhone whereas my devices are all Androids. The same app and feature would work on their iPhone, but on Android it does not work. The apps in question for example have been Chase Bank, Capital One, Costco, and even Whole Foods Market. Looking into the Logs, there's nothing that stands out on what could've blocked the features. I've already allowed the base sites of each app and still does not work. Has anyone ran into this before? Or know any extra troubleshooting steps that can be done?