I have been creating a PVA bot and was looking to do some customisation. Like automatically starting the conversation.
I used this documentation to create a HTML file for testing.
Automatically start a chatbot conversation - Power Virtual Agents | Microsoft Docs
When opening this HTML file on a computer it works. Looks as expected. (see example)

If I open the same HTML file on a mobile phone the text is so small it is unreadable.

If I open the Mobile App URI from Teams Channels on a phone it looks as expected.
Does anyone have any idea what is going on? I have looked through the Botframework style options (BotFramework-WebChat/StyleOptions.ts at master · microsoft/BotFramework-WebChat · GitHub) and cannot see anything that stands out which would exhibit this behaviour.
Or does anyone have any hints on having a better user experience with PVA on mobile? Like the phone keyboard overlapping the conversation.
Thanks,
Mickael