Hi @Jan Kenneth Penaverde , welcome to Microsoft Q&A forum.
Similar query is answered in the another thread: Does Azure SQL support IFI - Instant File Initialization
Posting here again for more reach.
Database Instant File Initialization is only supported in SQL Server and not supported on Azure SQL Managed Instance and Azure SQL. This is also highlighted in the documentation.
You can read more in the below article:
How to manage & measure database file autogrowth impact on Azure SQL Managed Instance
Please let us know if this helps or else we can discuss more on this.