When you first open an existing project in Adobe RoboHelp 2022 you will see that Master Pages are no longer shown in the Author pane, instead you will see Topic Layouts. 

Templates are what controls the appearance of online and print outputs in a way that makes exporting them to other projects easier. When you export a template, be it for online or print outputs, all the resources needed by that template will go into the export.

When you click the + icon you will see something different. Instead of just seeing the options for online outputs, you will now see options for print outputs as well. Print Templates give many more options for your PDF and Word outputs.

The online output templates are described in Online Templates.

The print templates are described in PDF Templates and Word Templates.