If you are running macOS Sonoma or later, Safari allows you to save any website as a dedicated app in your Dock. Open and navigate to facebook.com. Log into your account.
While there is for macOS from Meta, you can easily create a custom "app" experience on your Mac. Using built-in browser features, you can turn the Facebook website into a dedicated dock icon that launches in its own window, mimicking the feel of a native application. Method 1: Using Safari (The Most "Native" Way) facebook desktop app for mac download