Yes, you can use WordPress Multisite with Namecheap’s Shared Hosting, which offers cPanel access for manual setup, but it’s not supported on their EasyWP managed WordPress hosting; EasyWP lets you manage multiple single WordPress installs from one dashboard, not a single Multisite network. For true Multisite (a single WordPress install managing many sites), you’ll need their cPanel-based shared plans (like Stellar, Stellar Plus) where you can enable it manually, or use their multiple single site feature on EasyWP if you prefer separate installs.