I'm using "OpenVPN for Android". On my LG phone with Android 8 it shows up in that list just as a native VPN and I can edit it by clicking the gear icon on that entry in the list. There I can enable the "always on" feature.
But in EMUI, in that same VPN list, the gear icon is only shown for native VPNs. For my OpenVPN entry, theres an arrow icon instead. By clicking, it enters the OpenVPN app instead of showing an Android settings screen. Inside the OpenVPN app I can't do that system setting for "always on", I think that an app cannot set this setting, it must be done by the user in the Androidsettings.
Am I too stupid or did Huawei implemented the settings screens so strange that it is just not possible to access the needed screen?
Are there apps that let you change Android settings instead of using the proprietary setting pages from LG, Huawei, etc?