How can I accept all current changes in VSCode at once?

select the list of files to resolve from the MERGE-CHANGES section, then right-click your mouse and select Accept all incoming. That should do the trick for all files.

You will need to save the updated files once the conflicts are resolved. Click File and then Save All

Its very easy just go to vs code and press Ctrl+shift+p (command palette) or go to view and open command palette manually and type "merge" in your command palette, now you can see the Accept all current changes.

Select target file, right click and choose 'Accept All Incoming'.