FrameMaker version used: Adobe FrameMaker 2020
Step1: Select the text to which you want to add a hyperlink.
Step2: Right-click and select “Hypertext” from the available options.
Step3: From the “Command” dropdown list, select “Go to URL”.

Step4: Type the URL as displayed in the below image.
Note: DO NOT delete text “message URL” as it is part of the syntax.