Currently only delegated user permissions are supported, and this is very sub-optimal for bots and service applications that need to monitor Teams presence of users.
In an age where remote working is definitely the norm; being able to neatly integrate presence information with external platforms would be invaluable. Whether that's for notification routing or for consistency between systems.
We have an internal portal which pulls several systems together and provide staff with useful information and dashboards, and it would be good to bring in presence information, so as our staff move between Teams, Outlook and our bespoke platform it all feels part of one cohesive ecosystem.