QtWebChannel unusable with https ?

[Talkless]

Hi,

I am using QtWebChannel in mobile (Android and iOS) application to control Google Maps based webapp loaded with QtWebView from http://our.domain.tld/map, as result I have Google Maps in Qt mobile app, which is nice.

But, I've tried to load https, and now I get error about WebSocket (in Desktop build, so it's QtWebEngine output):

js: Mixed Content: The page at 'https://my.domain.tld/map was loaded over HTTPS, but attempted to connect to the insecure WebSocket endpoint 'ws://localhost:12345/'. This request has been blocked; this endpoint must be available over WSS.

So this does not work. If that would be a desktop application, I could install self-signed CA on target system to make self-signed web socket certificate for localhost "valid", but what about mobile solutions?