I use the latest version, the problem is not that the hyperlink cannot be generated, but its functioning. I'll give you an example, if I generate a hyperlink from the Web App of the Bimx Demo Hyper-model
Even if I try to send the link generated by the app to my phone via email, it doesn't work
the platform I use is Windows, the mobile apps are installed on iOS (iPhone and iPad).
everything that doesn't work now (at least for me) has always worked perfectly with the old versions, the links generated by the phone were opened directly from the app, now they don't open in any way.
Hyperlinks generated in the web app ("https://bimx.webviewer.graphisoft...") are for quickly checking the model in BIMx Web, which is optimized for desktop, and not supported on iOS since February. These links expire in 24h (see Help) to avoid overlap with model embedding. BIMx Mobile handles the "bimxapplication://..." custom URL scheme from outside the app, and never supported the "https://bimx-webviewer.graph..." generated in BIMx Web.
You can easily modify or create permanent hyperlinks for BIMx Mobile in every text-editing capable app including Archicad (e.g. link to one or multiple 3D elements, see article). The BIMx API documentation page 23-27 describes: import model, open model, open 3D with camera position+selection, open layout from outside the app or from element information, etc.
Please note that the recognition of "bimxapplication://..." as a link to BIMx depends on the mobile application where the URL is. For example on iOS, Notes and Mail apps recognize this custom URL even if it is embedded. Outlook also recognize the link, but does not support embedding. Gmail, WhatsApp do not support any of these. Unfortunately, BIMx has no control over how other applications handle custom URLs. To share such mobile hyperlinks with others, the best practice is embedding them into a website, the UI of mobile browsers support it. BIMx Model Transfer's Download button also uses this: mobile downloadlink copied from iOS Chrome.
I recommend checking other parts of the linked BIMx API documentation. Extensions are not that complex, and enable adding live data to BIMx, see example (as of this September at no additional cost thanks to the new cloud licensing).