Export fps settings Lightroom Mobile Pro

I have a premium Lightroom Mobile App membership for about one year now. Lately, I noticed that exported video files after color editing become 1/2 smaller, before the last update, the exported video files were same size or even larger than the original.

Do they get exported in original fps (60) or only in 30 fps? I have no control over export settings in the App! I need this information, please help!!