Telegram will disclose users' phones and IP addresses to authorities at their requests, the messengers' founder and CEO Pavel Durov said on September 23.
Yes linguistically that’s what the those two words mean.
But in the context of a messaging app, “Multi device” becomes one singular term with a set meaning agreed upon by everybody but you, that you’re trying desperately to change by deconstructing the words it’s composed of in order to misrepresent something that you evidently like a whole lot.