Yes, but only if your patcher supports Metal graphics. GarageBand 10.4.x requires a Metal-capable GPU. On unsupported Macs, the app will crash on launch.
Scroll through your list of apps to find GarageBand. Click the Download (cloud icon) next to GarageBand. Garageband For Catalina 10.15.7 -FREE- Download
macOS Catalina 10.15.7 remains a highly stable and popular operating system for users running older Mac hardware, such as vintage MacBook Pros, iMacs, or Mac Minis. If you are a musician, podcaster, or content creator using this specific OS, GarageBand is the gold standard for free Digital Audio Workstations (DAWs). Yes, but only if your patcher supports Metal graphics
Click your or avatar at the bottom of the sidebar. Locate GarageBand in your list of previous purchases. such as vintage MacBook Pros