CC with TSR Manager & Manual Download

Okay so for a million years I manually downloaded my CC and would just click and drag my .package files into the Mods folder in order to play with CC. Then, I discovered TSR Manager and its organizational glory. I spent a lifetime deleting and redownloading all my TSR CC with the TSR Manager. Recently I discovered JeyJeyBinks on TikTok and she has a great list of CC that she uses that comes from a variety of sites such as Patreon, tumblr, etc,. Now, when trying ye olde download and drag the .package files into the mods folder, they don't show up in game! Do I have to choose one or the other method of downloading CC?