Here I will give you a guide about how to delete albums on an iphone. So, you can read and apply the deleting album method:
First you need to open your photos app on your iPhone
Click on the album
Now find your album which you want to delete
Now tap and hold to see small X
Click on the x to delete album
Click on confirmation messages to delete album
source-
https://ityug247.com/how-to-delete-photo-albums-on-iphone-mac/
