Can I install Bitdefender VPN on my router so my smart TV and tablets are covered?
The answer is no. Bitdefender VPN is a software based product and will only get installed on android (smartphone & tablet), mac & windows.
If you need additional protection for your router and smart TV, you will have to go forward and check out Bitdefender BOX (https://www.bitdefender.com/box/)
(Bitdefender beta tester 2019/ 2020)