@EP1846
Hi please follow the steps.
In a new screen add a Edit form.
Edit form Data source --> Add your SharePoint list.
Edit form items --> Gallery1. Selected
Add a Edit icon from icon
OnSelect of Icon --> EditForm(nameofyoureditform); Navigate(screen where editform is present)
Submit button on edit form screen.
SubmitForm(Name of your edit form)
Let me know if this works.
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