In my web browser (both Chrome and Edge) I can easily/quickly switch between tabs thanks to the keyboard shorcut option + command + left/right arrow.
This is an “interactin pattern” they also use in e.g. Figma. (The exact same key combination.)
Personally I would really appreciate to have this keyboard shortcut in Miro too, so that I can more easily / faster switch beteen the different Miro boards that I have open.