There is no hard limit on the number of sections, items or options that you can have on your menu.
If your menu is extremely large, then customers that have a slow internet connection or a slow device may experience delays while the menu loads.
We have tested menus that have had 3000+ items and menus that have 8000+ options without any degradation in user experience.
Note: there is no limit to the number of images that can be uploaded and high resolution images should be uploaded.
Related article: Menu Images