I note that Miro does not support layers.
In most professional design/layout softwares, layers are not only used for visibility front/back relationships but locking and many other features that I won’t list here.
Yes, you can manually “lock” and “unlock” in Miro, but this is exceedingly cumbersome and annoying when you have lots of elements. If you don’t lock things, then you or others can easily drag them all over the place.
It would be highly beneficial to have layers that not only are used for visiblity but also for locking.