For me the big question is why? Proprietary software needs telemetry because the user is not in control and features are only added by the owner of the software, thus the centralized owner needs to know what features to add.
Open source is different. It is decentralized. Anybody can tweak the system to make it better for themselves. In addition, as opposed to proprietary software which sells licenses, the most common open source monetary model seems to be selling support in which case the people buying support can ask for the feature without telemetry.
To put it another way, you need telemetry for a cathedral since decisions are made centrally. A bazaar doesn’t need telemetry, since decisions are decentralized.