Put simply: yes

The typing scheme is highly innovative and the code they used to do it is proprietary so its a little hard to get started replicating. Further, they have a design patent that means you need permission from the company and licensing to replicate that action. The way they do this licensing and permission means its FAR easier to get that permission and include the proprietary binary blob than to reinvent the mechanism. I'm sure there are extreme radical FOSS-heads interested in doing this with code they're working on, but any big project that wants to create a legitimate daily driver keyboard is going to be more focused on other problems surrounding ethical predictive text and the precision of screen taps. Like this is more a question of what problems are worth solving than anything. There's plenty of hard problems in the mobile keyboard space that don't involve lawyers, especially when getting access to the Swype lib to embed in keebs has thus far been pretty trivial and that lib has been found to be not gnarly in audits.

Personally I do have worry about Swype doing a rugpull with this licensing to keyboards that are using it, since that's one of the paths of enshittification/rot-econony, but I also wouldn't choose not to use a keyboard without swipe gestures (in fact my current keyboard doesn't have them because I can type fine enough without them and its one less thing to install or worry about)