At this point, SmartThings has made its API publicly available, so it is up to the device manufacturers to create and maintain the integrations. So the feature requests have to go to BroadLink. And to be honest, most manufacturers aren’t very interested in doing the time and work to create a SmartThings-specific integration. 
The good news is that Broadlink’s parent company HAS recently joined the standards organization for Matter. The whole point of Matter is for home automation device manufacturers to have to create only one integration which would then work with all the major platforms, including SmartThings, Apple Home, Google Home, Alexa, and more.
Matter is just starting to roll out and there have been quite a few bumps along the way, but I think it’s the most likely way that BroadLink and smartthings would integrate in, say, a year or so.
But the emphasis on matter also means that fewer and fewer companies are interested in doing labor-intensive proprietary integrations like one unique to smartthings.
So probably the best thing to do is to ask BroadLink if they intend to be a “matter bridge“ which is the way they would integrate with smartthings.
More discussion of matter in a smartthings context:
Matter - smart home connectivity standard (formerly Project CHIP)