As of late 2019, smartthings has made their API public, and it is now up to the individual device manufacturers to provide a smartthings integration if they choose to do so. So you should make the request of them.
That said, if it works with Alexa you may be able to use Alexa routines as a partial integration if the smartthings/alexa integration works for you. (That integration has had multiple problems over the last couple of months and they are supposed to be working on it, it’s not clear what the current state is.)
Here’s the thread on the integration:
New SmartThings Alexa skill (2020)