Can we merge custom cells using write to data store entity plugin

Do we have any possibility of writing merge custom cells using write to data store entity,

Firstname, lastname, city and state are fields from DB. I want to write Name and address but name column should be a merge cell i.e. A1:B1 , same goes with address column. We have the possibility of doing this with the template i.e. keeping this template. But what if, we dont want to use a template then do we have any option.

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