@97Epic97If you made a secondary Apex Legends account after the 26th of October, then your account wouldn't be eligible for cross progression. Even if they are linked under the same main EA Account.
https://answers.ea.com/t5/News-Game-Updates/CROSS-PROGRESSION-IN-APEX-LEGENDS/m-p/13131198#M172And yes, if you didn't receive the prompt in the main menu then cross progression hasn't got to you yet. Eventually, it will get to you to allow you to merge your accounts.
If you'd like more information on cross progression, you can check the quick guide link I provided in my previous post.
If you have any other questions, please don't hesitate to ask.