CallHub has started migrating regular 10-digit numbers to carried-verified 10DLC numbers and plans to be done by July 31, 2021. So if your account has been moved, you can continue to rent numbers like usual, and they will be 10DLC enabled.
If your account gets shortlisted for the migration to 10DLC numbers, you will see a notification on the "Numbers" page indicating the same.
If 10DLC is enabled for your account, you can rent the numbers while creating the campaigns on your CallHub account as usual and the number will be 10DLC enabled.
If you wish to select a number, navigate to the "Numbers" page and rent a number manually.
Please feel free to contact CallHub Support if you need any further information.