There is currently no method to integrate MyQ to SmartThings.
There are third party devices that can connect your Security+ 2 Chamberlain Garage Door Opener to SmartThings such as Meross, TailWind and Ratgdo.
I did post yesterday that the new generation Security+ 3 Chamberlain Garage Door Openers - all 3rd party accessories have been shut down except for any Chamberlain partners which requires a subscription to MyQ.