Hi Andres,
PowerServer Web was a feature of PowerServer 2020 and earlier, which is available up to PowerBuilder 2019 R3. Starting from PowerBuilder 2021, PowerServer got rewritten from the ground up and is now architecturally different from PowerServer 2020 and earlier and thus has no "PowerServer Web" feature.
However, PS 2021/2022 are similar in concept to PowerServer Web: they allow multiple users to consume a PowerBuilder application located in a central location, but instead of running inside a browser they run natively on the customer's PC. Additionally, instead of having the application directly access the Database, the data access is provided through a REST API by a C# ASP.NET Core Web API, which provides an additional layer of security by avoiding the storage of the database credentials on the client's PC.
Please review this product feature page to learn more about PowerServer 2022, and this documentation page to learn how to deploy to this new PowerServer.
Regards,
Francisco