Hi @Gabriel Remus Linck Duarte ,
Welcome to Microsoft Q&A!
According to the documentation MiracastReceiverInputDevices, mouse is not supported yet.
I'd suggest you submit a feature request about this feature in the Feedback Hub. You could find the Feedback Hub in the Start Menu. Please select Developer Platform->API Feedback as the category when you submit your request. The related team will check the request.
After you submit the request, please share your link, I will help you submit this request through internal channels.
Thank you.
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