After adding channel features there are some changes in UI and navigation. That's why you face problems.
Here is the step-by-step guide to deleting status on new whatsapp on both Android and iOS.
First, open whatsapp apps from your Android or iOS device. and got to the updates tab.
Now tap on the MY status option. That will show you all the media you share on whatsapp status.
Now scroll up the viewer section to expand it. And then tap on the three-dot icon.
A pop-up appears, Choose the delete option and then confirm to delete the whatsapp status.