How to add board co-owners

@Kasper Falke Jensen - At this time, it appears that only team members with a paid seat can be granted the Board co-owner role. I tried adding a non-team member to a board as a Guest and then promoting them to Co-owner as was told:

You haven’t specified what functionality you require the the other consultant to have, so perhaps the Guest feature will work - you can read more about the role here:

https://help.miro.com/hc/en-us/articles/360021415119-Collaboration-with-guests-BETA-

You can request to be added to the Guest Beta by submitting a request to Miro support as per the following post by @Dominique Rolink:

https://community.miro.com/product-news-31/introducing-a-new-guest-role-beta-renaming-roles-6201?postid=27598#post27598