You don't understand the GDPR then. The focus is on controlling where data goes (not out of the EU), but your point is about telemetry in general. If you keep the data inside the EU and manage it in a way that's compliant with the GDPR then then that telemetry doesn't put you in jeopardy.

If you want to be protected for telemetry then you need to advocate for better legislation. Stating that something is covered by the GDPR ultimately masks the issue because it's not against the GDPR and you lose an opportunity to advocate for better legislation to reduce, or kill telemetry.

Collecting data is not against GDPR. GDPR is about consent, processes etc.

Whether or not this is compliant depends on the way their installer is set up.