Geting data from PSA Timesheets


First, I apologize for my ignorance regarding Dynamics 365, but I am having trouble fething data from it.

I need to get (and save) data from Timesheets of Dynamics 365 PSA. Actually, I am using Power Apps and I am able to fetch data from Project, Accounts with just using connector, but for Timesheet (or Hours) I think I need to use REST API.

Can you tell me how can I do that? And how can I save data back to timesheet?

MS pages aren't very useful, I need actual example. I've managed to get timesheet data from Business Central. How similar is this?