To export all the files in a given project tap on the three dots next to the project name in the Project list view, tap Share / Export, then select how you would like to export. (You can also us the Share up arrow icon in the lower right corner of the Edit screen.)
Selecting Video will export a single .MOV file at the resolution and frame rate you recorded with and the audio with whatever mixing and effects settings you applied.
Selecting .WAV or .M4A will export a single audio file with whatever mixing and effects settings you applied.
Selecting Export Multitrack will export a zip file containing individual .wav and .mov files for use in other tools. Refer to this article for more information on Multitrack Exports.