Hi @silviavg,
Based on your description, I have made a simple test for your reference.
1. I have a SharePoint list called Ignoreblank, and it has a text column called Fech, with "dd-MM-yyyy" format.

2. Here is my flow:
formatDateTime(addDays(utcNow(), 1), 'dd-MM-yyyy')


3. Result screenshot:

And a kindly reminder: you could pixelate your site address in your actions, which includes your personal information.
Best regards,
Sylvia