Currently, there is no way to disable telemetry in Minecraft. Normally this wouldn't matter so much, however Microsoft also requests your player XUID which can easily be stolen by a MITM attack.

Please make changes so that either you won't collect player XUID and other identifying information, or preferably add an opt-out button.

By the way, https://www.minecraft.net/en-us/privacy/gdpr is not up to date anymore.