Apple no longer issues security updates for Mojave (support ended in November 2021). If you plan to connect your Mac to the internet, ensure you have a firewall, ad-blocker, and avoid suspicious downloads. For offline work, audio production, or legacy gaming, Mojave is a masterpiece.
Apple no longer lists Mojave on the main App Store search page, but it is still available via direct links. macOS Mojave | Specs, reviews and EoL info - InvGate download 10.14 mojave
Search for: – Look for the section titled "Download macOS Mojave" . Apple no longer issues security updates for Mojave