As of 22-June-B release sites can now set paragraph styles per meeting type. See below for how to set these up.
From the User menu, select the Site settings
Then select Meeting types.
Under the Meeting you wish to update, select the Blue pencil
Select the formatting tab at the bottom of the list
From here you will see three Paragraph styles and their default settings. You can then Select the blue pencil and update the settings as required.
Once set, users will now be able to apply the formatting set here.
Please note, the Normal setting will be your default format for users, if no formatting is applied.