The End of Support Calendar shows Microsoft Operating Systems end of support dates, whether they are the end of mainstream support that updates features and cosmetic changes, or extended support, which ends security fixes and all Microsoft technical support other than old web pages.
Windows 10 Home and Pro End of Support
According to Microsoft's Modern Lifecycle Policy, "Microsoft will continue to support at least one Windows 10 Semi-Annual Channel until October 14, 2025."
Editorial mode ON: Yes, it's vague. This entry will be updated once there's news, but that's unlikely before early 2024.