Can I mirror macbook pro to smart tv?

No. The AirPlay 2 capabilities of your Smart Tv are not compatible with the Airplay capabilities of High Sierra.

At least, it did not work for me from a 2011 Mac mini with High Sierra. The Tv simply does not show up in the Airplay menu. The Apple TV connected to it does.

The only other option would be to connect directly with an HDMI cable.

Walter Lew wrote:

I have a 2011 MBP running High Sierra 10.13.6. Can I mirror it to an Airplay-capable Smart TV?

Use AirPlay to stream video or mirror the screen of your ...

Yes. newer macOS versions such as Big Sur or Monterey can Airplay to an Airplay 2 capable TV.