After a bit more googling…
Editing my comment to reflect even more googling…
The SS device which is the Abbott Glucose Sport Biosensor References and Disclaimers is not approved in the US.
Given this, I’m not at all surprised it is banned in competition for anyone who does not have a medical exemption (i.e. diabetes). Or similar devices are banned that may or may not be approved for diabetes use but are used by athletes without diabetes.
Medical devices and apps that render data from medical devices are regulated by individual government bodies. Approval of these devices is specific to the exact use case for the device - to monitor diabetes for example, but maybe not to treat it (without another device) and definitely not to diagnose diabetes, and not to provide performance enhancement during bicycle races or menstrual cycle monitoring BS. In the case of this device, it is intended for sport monitoring, not diabetes monitoring. I’m sure abbott has something similar that might actually be approved for diabetes monitoring… or perhaps they wanted this to be approved but it isn’t accurate enough? You can see that SS is not available in the US. This is is presumably because of regulatory hurdles. It would not be fair to allow some competitors to use a device that is not regulated in their country (or is regulated and approved) while other riders cannot access that device due to country-specific regulations. UCI would be inviting a bit of a regulatory nightmare IMO. Obviously drug treatments face similar issues (regulations vary by country), but these are deemed medically necessary for competition and are typically banned otherwise.
I would love to know how that press release aligns with the approved use of the devices :).