Is a companion app that shows text over the HDMI input allowed in LG Content Store?

Hi,
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▎ We are planning a free webOS TV app that works together with our iOS app. The iPhone reads game subtitles with its camera, translates them on-device, and sends the translated text over the local network to the TV app. The TV app shows the text at a position the user chooses, on top of the game playing on the HDMI input.
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▎ To stay on top of the HDMI input, we would use “transparent”: true and “defaultWindowType”: “floating” in appinfo.json. The iPhone app would launch the TV app via the Second Screen API and pass connection details as launch parameters.
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▎ Our questions:
▎ 1. Would an app using a transparent floating window over the HDMI input be accepted in the LG Content Store?
▎ 2. If not, is there an official API or approved way to display text over HDMI/game content?
▎ 3. Is a companion app that needs our iOS app to show content acceptable, if we provide a test account and a UX scenario for QA?
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▎ Thank you.