Doesnt work properly with gmail

Experienced Opera user. Just installed O-Mini on iPad Mini. Opened gmail and it wouldnt let me use the browser version. The Google mobile version doesnt have obvious (if any) way to log out or switch account; it doesnt have google programs drop down to open a google doc; and after opening a spreadsheet created in google sheets via an email link, Opera Mini wants to install Sheets, not recognizing that the Sheets is already on the iPad!

sgrandin about Opera Mini web browser, v12.1.1