How many people user miro exclusively on a mobile device (i.e. iPhone)?

I'm looking for solutions for a large community (20,000 members) and I know that my experience with Miro for annotations on boards is great for mobile, but when the boards become large, the app crashes and doesn't work well.

So, I wonder if it might be possible to make the miro app function like telegram or discord in that they provide the user with a linear view of each object posted to the board (same as activity view).

I'd like to see the user just scroll to each object and be able to add a comment or draw on the object presented.

And I'd like to see it work fast without crashes and with the ability for the person to download the thread (like telegram supports downloads) so, if they wish, they can view it offline as html.

I would like the boards to appear at the left or with a menu or with a swipe action making it easy to switch between multiple boards and manage the conversations.

And as topics are updated on the real 2-D board (for example a comment or annotation/drawing is added to a prior object), that the object gets tossed back onto the mobile stack so the mobile users will see it in real time.

The activity view does a good job of this. So if the mobile view had a way to select the largest object under the updated object, (for example, a user has a screenshot and they draw on it), the mobile would see the drawing, then find the largest object under the drawing and use those x-y coordinates to find the right "view" to present on mobile and serve it up as a screenshot or vector image so they can then zoom on it if necessary but not pan around on the board like we can do on a desktop version of miro.

Basically, we would turn miro mobile into a linear activity view that makes viewing a board on mobile a joy and allows a mobile user to participate by drawing in a specific area of the board anything they wish or adding a text comment just like responding to a telegram/discord/slack message... (using the comment function in miro) 

As for new posts, perhaps miro can offer a mobile staging panel so that an administrator can take posts made by people on mobile and move them to an appropriate frame on the board at a later time. That way, they are not cluttering the board as people post new material. They would appear in a frame like the current desktop clipboard feature.