Attendee view on a webinar using a mobile device

As a regular host of Webinars with up to 3000 attendees, I recently logged into on of our webinars on my mobile device to check the 'attendee view'. Most of our customers join on a mobile.

My view as an attendee was 2 very small tiles at the top of the screen (Iphone 12) and I could not change the view on my device.

As the host, I had 2 panellists spotlight side by side, and no matter what combinations of 'views' i tried from the top right, I couldn't change the format for the attendee... to make the panellists fill the screen. See attached screenshots....

Please help!