"Beware, Discord is very shifty when it comes to privacy data requests. Last year their Privacy Policy stated "In addition to the functionality available through the “Settings” of the Services, in which you can correct, update, amend, or delete certain personal data, you can also request . . . from us directly. Please write us at privacy@discord.com with the words “Personal Data Request” in the subject . . . along with an explanation of what data subject right you are seeking to exercise."

However they have since removed that text and there is a new clause that states they have a dedicated "Data Protection Officer" email. See, what they don't tell you is that privacy@discord.com is only for questions about privacy - not data requests. They have kept their DPO email hidden until recently and now it shows on their privacy policy as stated "You can contact Discord’s Data Protection Officer at dpo@discord.com." Curiously, they have removed all mention of "Personal Data Request" from their Privacy Policy. So unless you know what you are doing, you wouldn't know what to look for. Just a heads up!"

This comment was made by a certain "Joe" under the section of Contact information for privacy-related requests to “Discord, Inc.” on that same website i linked. So as he said if you will report a deletion request for Discord, make sure you send it to their Data Protection Officer at dpo@discord.com.

To add on to this, after you verify your account with a prepaid sim number, you can port that number to a free VoIP service so it becomes useless for tracking you IRL but you can still use it to reset your password if needed. It's not like they keep checking after it's already verified.

you just have to manage to not let your account flagged

That seems to be very easy. I've been using it for over half a decade, am a member on dozens of very different servers, interacted with hundreds of people, wrote tens of thousands of messages - I actually checked all those numbers - and participated in discussions about all kinds of topics. My assumption is that the threshold for this sort of flag is set really high. Either that or it's different based on where you live, maybe based on laws or politics or such.

New accounts work perfectly fine without a phone number as well. Only certain servers require one. It's an option in servers settings. It could also be a regional thing.

It's interesting how the truth gets downvoted while misleading information gets upvoted. Apparently people like randomly clicking buttons without verifying anything. That seems like it could be really harmful. Since votes are public information, maybe there's a way to play around with that.