Hello, please update to the latest version of the SDK and see if the error persists. The function exists in PresenceApi.js and in the typescript definition. That specific endpoint hasn't always existed though, so it's likely that your dependency is quite out of date; the latest version is 131.0.0.
I just entirely deleted the node_modules folder and redid the npm install and am still seeing the issue. The method exists in the typescript definition as I can use it in the code, but when I go to execute on the browser, I get the not a function error.
It sounds like there's likely some issue with your compilation or deployment process that's caching an old version somewhere. I have confirmed that the package served by npm for v131.0.0 does contain the function in question.