I'll explain the steps I followed on my Android phone:

1. I got ProtonVPN, and enabled kill switch to protect myself from data leaks.
2. I noticed that certain apps (like my bank app and music app for example) didn't work while Proton VPN was enabled.
3. I enabled split tunneling and created exceptions so that apps like my bank app and music app didn't go through the VPN.
4. I enabled kill switch, and found out that split tunneling didn't work.
5. In order to use my bank app, my music app, or others, I HAD to turn off kill switch. I very very very much want kill switch to be on. I am in a politically sensitive area. I want my bank app and music app and the others to continue to work while kill switch prevents non-excepted apps' traffic to be FORCED to go through the VPN.
6. As it is, I have to choose between having kill switch on (meaning I'm unable to use many of my apps which don't work through the VPN) or having kill switch off (meaning that if for some reason Proton VPN isn't working, all of my traffic is going through my actual IP address without VPN protection).

Well it finally happened. Since for some reason Android doesn't always keep Proton VPN working, sometimes it's off even when I didn't turn it off, and a company noticed that sometimes my traffic goes through VPN and sometimes it doesn't. I got permanently banned from a service I had used for over a decade because of this bug in Proton VPN.

For paying so much money, this is a feature that should be working. Come on, Proton! You have awesome products! I love them for the most part. But this makes Proton VPN on Android functionally worthless. I have to either have kill switch off, in which case I keep not realizing that Proton VPN isn't working and keep endangering myself; or I can have kill switch on, in which case I just lose the ability to use many apps that won't work through the VPN connection. I have to turn off Proton VPN entirely when using those apps, and in that case I can't use an app requiring a VPN and an app requiring no VPN at the same time.

I really need this feature if I'm going to consider continuing to use ProtonVPN. Competitor products generally seem to have this feature. I don't want to jump switch, but this is pretty urgent.

Please, Proton. This isn't just for convenience. For those of us in countries where it's not safe to browse without VPN, we NEED Proton VPN to support kill switch for all VPN-protected apps while split-tunneled apps are allowed to have their direct connections.

In politically sensitive countries, this literally may be the difference between people being arrested or not.

(and just to throw this out there, I'm not doing anything that would be considered illegal in democratic countries)