Hello!
Thank you for reaching out. There are actually several places where you can download Magisk modules. Here are some recommendations:
1. Magisk Manager App - You can download Magisk modules directly from the Magisk Manager app. To do so, open the app, go to the "Downloads" tab, and browse through the available modules. Once you find a module you want to download, simply tap on it and then tap the "Download" button.
2. XDA Developers Forum - The XDA Developers forum is a great resource for Android enthusiasts, and there are plenty of Magisk modules available for download there. To find Magisk modules on XDA, simply search for "Magisk modules" in the forum search bar.
3. Github - Many Magisk module developers host their modules on Github. To find Magisk modules on Github, simply search for "Magisk module" or the name of the specific module you're looking for.
I hope this helps! Let me know if you have any other questions.