I am running an unrooted OnePlus 7T with Android 10 (May 1 patch).
I downloaded Blokada from your website as an APK.
I am running Blokada 4.7.3 (android-29 full official arm64-v8a OnePlus-OnePlus7T touch API compatible.
When I connect to any gateway, routing to the internet works (aka I can open any website).
When I switch to your Montreal gateway, no webpage works (not even neverssl.com or captive.apple.com)
Obviously my wifi works without blokada and with Blokada tunnel to any gateway except Montreal.