
In preferences keymap under 3D View you will see the Grave Accent/Tilde Action. Navigate needs to be highlighted for the view pie menu to show up. If you are getting a Move, rotate, scale pie menu then that mean you have Gizmos selected. If you are being put into a walk/Fly mode then you have Pie Menu on Drag checked. In which case to get the pie just hold the tilde down and move your mouse or you can uncheck that option.