@jja
Your formula would be similar to the following:
Patch(yourDataSource,
ForAll(Filter(yourGallery.AllItems, yourCheckbox.Value),
{ID: ID,
column1: column1Value,
etc
}
)
)
You need to provide the primary key! In the above ID is used as the primary key (i.e. SharePoint), so for Dataverse, determine what your primary key is and replace the two ID's in the above.
I hope this is helpful for you.
