Normally, offer letter max is 1-week. U will know either approved.or rejected.

In your case, the complication.could be cos joint loan with non spouse or family member.

Also can be that your credit strength not very good. Either way, u should follow up with your bank sales agent.

Rare that u apply from so many banks and all delay in issue offer. Or rejected letter.

Issue could be with your developer or project. Which project is this