In AWS Advanced configuration toggle "Mark stopped resources are maintenance" to Yes. This setting would automatically mark all stopped instances as maintenance and you will not receive any alert if an instance is stopped or disabled. There are other settings here that you can make use of too like the EC2 scheduled events, license related setting and more.
You can navigate to Advanced Configuration by going to AWS tab > Selecting the account > Serivce View > Hamburger icon > Edit > Advanced configuration (Expand it).
Hope this helps solve your case.
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