If you'll go over to the Windows 11 thread, you can read about the security situation with Windows 11.
Meanwhile, Microsoft has a $3,500 Surface laptop that will not be able to run Windows 11. If you bought one, it will be hard to walk away from it. But a cheap laptop is easier to abandon or replace if necessary.
Windows 10 will continue to run fine at least until September 2025 (when MS will drop support). By that time, you will have replaced your cheap laptop anyway.