Thanks for your quick reply.
I have created multiple galleries and at the moment I use the gallery shortcode to add the gallery directly to my page.
I’ve also created a few albums, and I can see (by adding the album shortcode to my page) that I’ve added a gallery to the album, however I can’t see where to add the album cover at the moment. Is this because I’m using shortcode to add the album to my page?
Not sure if it makes any difference but I’m using Divi theme which has a built in page builder and I don’t use posts to create my website, I use pages.
Thank you for your help with this.