There is a difference between creating a new Apple ID and changing an Apple ID. If you got a new email address, you don't have to create a new Apple ID, you just have to update the ID to reflect the new email address. This explains how to change your Apple ID.
Change your Apple ID - Apple Support
Change your Apple ID - Apple Support
If you simply changed the ID, you should be able to update the apps using the updated ID. You should follow all of the steps in this support article.
What to do after you change your Apple ID email address or password - Apple Support
If you created an entirely new Apple ID, then you will not be able to update the apps that you bought with the old ID because purchases are always tied to the ID that was used to make the purchase.
Did you change your ID or create a new one?