Latest version on Mobile device

Volumio Information

Volumio Version:2.861
Hardware: Pi3B+
DAC:IQaudio Pi Digi-Amp+

Hi all. I have not been on the forum for a long time now. My Vollumio music player has been fine for at least 2 years now.
I had been running V.2.452 without problems but 2 days ago up decided to update to V.2.861
The update went without problems. However, unless I am doing something wrong I seem to be missing some of the icons such as settings. I am using the GUI on my Oneplus 3 phone and did not have this problem with the earlier version installed. For now I have rolled back to the older version. If the GUI was on a pc screen I believe that according to the Vollumio installation instructions there would be some menus on the left hand side of the screen. I can’t see this on my mobile.
Any ideas or help?