When your products are set to an 'active' status, they will be visible on your online store under 'Catalogue' on your main menu. You can customize your main menu further by linking specific collections, pages, or other links. You can learn more about setting up collections here and linking them to your main menu here.
You'll want to confirm that all products are set to 'active' under 'Products in your admin. If they are, then the next step is to ensure that your products are set up to appear where you expect them to appear. For example, if you are looking at a specific collection link on your store and you do not see all the products you expect to see, then you will need to go to Products > Collections > Select the specific collection to ensure the correct products have been linked to the collection.
Let me know if this helps! If not, please send along some links and examples so I can help further.