Follow these steps:
Open Visual Studio Installer: Launch the Visual Studio Installer from your Start menu.
Modify Visual Studio: Click on "Modify" next to your installed Visual Studio version.
Select Workloads: Check the "Data storage and processing" workload. This includes SQL Server Express.
Click on the "Modify" button to install the selected components.
Open SQL Server Express: After installation, you can open SQL Server Express through the SQL Server Management Studio (SSMS) or by searching for "SQL Server" in your Start menu.