You may not be able to automate them using the "default" options like ClickItem or ClickCell or things like that. However, you can still interact with them using native methods and basic "Keys" and "Click" methods. You may need to write custom code for you to be able to simulate those items.
You can request support... but if it's not a broadly used component set with a large market share, your guess is as good as mine as to whether or not support will be added.
Robert Martin [Hall of Fame] Please consider giving a Kudo if I write good stuff ----
Why automate? I do automated testing because there's only so much a human being can do and remain healthy. Sleep is a requirement. So, while people sleep, automation that I create does what I've described above in order to make sure that nothing gets past the final defense of the testing group. I love good food, good books, good friends, and good fun.