My Super Search plugin allows you to filter by multiple objects. Give it a try and let me know what you think!

From a similar Wish List idea post from @Alexander Mitte:

Description: Currently after selecting multiple objects, you are only able to filter for one specific type of object (like sticky notes). What I often need is the capability to filter for everything BUT a specific object type (e.g., stickies). This is needed for example to lock everything but sticky notes for creating boards for teaching sessions.

Benefits:

• Ensures seamless layout maintenance during teaching sessions and collaborative projects.
• Enables educators to securely design teaching materials while promoting interactive engagement with students.
• Enhances team collaboration by safeguarding critical components while enabling flexible editing of other elements.

I would love to see this as well!

It is almost a daily occurence that I want to select items of two or more different types.

Even more needed almost on a daily basis is the option “everything BUT” to exclude certain types from a selection. I do it all the times, especially for locking bigger areas. E.g. I want to lock everything BUT the stickies or tables or anything so people can edit them, but everything else is locked.

I could, in theory, filter each item type and lock separately, but that leads to weird behavior when I need to update certain spaces and have to unlock by type not by area or similar.

Until Miro implements this necessary feature, I appreciate any hints on how to make life easier.