There's a few companies in the US making them for most "heavy" (for some definition of) bikes, usually under the pretext of "old/disabled people".
I've seen a model for the Venture and there is one for the touring Harleys as well.
Not a new idea and expensive like ****, I am also surprised it made it to the CTX1300 so fast. At this speed, we should see automatic clutches (also a "been there, done that" for bigger bikes) showing up this winter and pipes in spring
So far all I see is from GL-Korea Material company. Did a google search on "ctx1300 landing gear" and that's all that comes up on the first page other than this thread. A few companies make them for HD and Honda GL and other bikes. Most riders I know just spend the money to trike their ride.
I would not mind this Landing gear for very uneven surfaces, or even in gravel, or grass when it is wet from dew, or a previous rain, or for that matter a gravel driveway, in which one of my brothers has, while the other one has a gravel/grass driveway in my opinion. I refuse to put my bike on those types of driveways because they are a pain to get any traction on the bike when trying to back up on them, in my opinion. There are some that would consider it to be training wheels like one guy says in the comments, I think on a similar video at: https://www.youtube.com/watch?v=IYZ_f1yszc4 from a SDGunfighter, that probably has never ridden this type of bike before.