Hi @Pilar, I tried reproducing this by using this Sheet. running the below workflow:
That’s on the current version of n8n with the current node version though. Based on your description you seem to be using an older version of the node which wouldn’t be actively maintained anymore I am afraid.
Seeing the current version does not have support for your specific use case, perhaps you want to call the Google Sheets API directly through the HTTP Request node? This way you wouldn’t be limited by the options provided by n8n’s Google Sheets node. How to style Google Sheets cells - #3 by MutedJam would have an example of how to do this in principle. Even though it’s not the exact update you have in mind it could serve as a starting point for your own workflow.