You can get sunflowers in survival and creative but it is impossible to get them with the /give command or delete them with the /clear command
Comments 2
Thank you for your report!
However, this issue has been closed as Invalid.
As mentioned in the comments the sunflower is named double_plant currently in Bedrock. While this can be confusing, this is more of a feature request or a suggestion than a bug with the game.
We're very keen to hear your ideas though, so please head over to the Minecraft Feedback Site where you can search and vote for existing topics, or add a new thread if necessary.
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Use double_plant instead of sunflower