UI Buttons to map, linking to layers

The Ability to edit or add extra buttons to the Project map interface would be great.
Within the Mergin Maps, we use a layer without geometry to record extra data, and a button to add a feature to that would be great, especially one which could change depending on completion.

For example, we have a form filled out once daily, so once it is complete (the condition met) it could be ticked/greyed out.

Thank you :)