User settings (language, time zone, number format...) in APEX

Summary:

We are trying to build an APEX extension to Fusion. There is a lot of nice support there, but one thing we are missing is: how can we get a hold of the fusion user's session settings for language, date and number format?

Content (please ensure you mask any confidential information):
In an APEX extension to Fusion ERP, how can we inherit the Fusion user session's settings for language, date and number format?

Version (include the version you are using, if applicable):

Latest (25C and OCI APEX running in ATP)

Code Snippet (add any code snippets that support your topic, if applicable):