To copy and paste text, we either use the Copy and Paste context menu items or we use Ctrl+C and Ctrl+V keyboard combinations. But when we do this, the formatting is normally preserved.
Users will be able to check that merge formatting is the default option via the usual Paste Options menu (File > Options > Advanced > Cut, copy ... source "that has meaning" - for example ...
Fortunately, many of Mac's operations are very similar to Windows, including its copy and paste function. It'll only take a little bit of patience and practice until you're just as fluent in Mac ...