We'd like to know more. Are you referring to 'Creator Monthly Newsletter'? If yes, could you check these settings: Go to your YT account notifications > Check “Tips and news for creators (including Creator Pulse email)”? Let us know if this helps!
Thanks for the details. As a next step, we'd recommend sending a feedback report directly from your YouTube account with these steps: https://yt.be/help/RYwc . While you may not get a direct response, we do review and use the details to investigate and fix issues.