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The SSIS support is an optional install with SSMS. Find the Visual Studio Installer in the Start Menu and launch it. Find SSMS 22 and select Modify. Flip to Individual Components and select SSIS. (You will also have to include the SSAS and SSRS support).
Once you have added SSIS to SSMS, you should be able to create SSISDB from SSMS according to https://learn.microsoft.com/en-us/sql/integration-services/catalog/ssis-catalog?view=sql-server-ver17. (I don't use SSIS myself.)