Welcome to the forums. Which phone do you have? Do you have a phone or a launcher that doesn't have the app drawer set as default? If so, search for that option in the Home or launcher settings.
Some phones from LG, Huawei and other brands come with the option to hide the app drawer and have all the shortcuts on the home screen as default. You just need to change this option in the settings.
I agree with @Javier P regarding the launcher. If the default launcher installed on your phone doesn't offer the app drawer, then I recommend using a different launcher from Play Store.
I used to have an LG phone, but I used Nova Launcher, not the inbuilt LG launcher.