Since you had already applied for TRV with implied status before your WP approval, I would suggest you to raise web form with your TRV application and WP ext. application number and explain your condition. IRCC will surely consider this as far as I know.
Regarding your first question, as long as you have valid approved WP ext. and stays in Canada you don't need to do any further action. If you want to travel to outside Canada and come back then you will need TRV stamped in your passport.
