Hey there! You should still be able to add fields either via clicking into the field headers within a view or in the Customize fields option of the view menu. Here is a quick recording of these options in an example base of mine on mobile. Let me know if you come across any trouble in doing so on your side of things!

Perfect, thank you for your help! Great support! 

Absolutely; it was my pleasure to assist here. Glad that this could do the trick!