We have reviewed your query and currently, we don’t have support for customizing the shape of the DropDownButton effects in hover state, so we created a feature request to "Provide Support for Customizing the Shape of the DropDownButton Effects in Hover State in .NET MAUI SfComboBox". Please find the link below to track the status of the feature implementation.
Please cast your vote to make it count. We will prioritize the features every release based on the demands, and we do not have an immediate plan to implement this feature since we have committed to already planned work. So, this feature will be available in any of our upcoming releases.
If you have any more specifications/suggestions for the feature request, you can add them as a comment in the portal. We will share the release details in the feedback itself.
Regards,
Kamalesh P
