Understanding EC2 Under-provisioned

Hi,

I have a t2.micro machine which is running a small application in it. When I saw the my machine is Under-provisioned then I look into details I found its EBS is under provisioned "EBS read operations (per second), EBS write operations (per second) , EBS read bandwidth (MiB/second) & EBS write bandwidth (MiB/second)".

I have created my infrastructure using CF. I have update the code to change the my EC2 instance type to t3.micro and volume type to GP3 volume. Now when I see the AWS Compute Optimizer it says "AWS Compute Optimizer finding Auto scaling groups with mixed instance types are not supported yet". I wanted to know why its not showing the findings.

After updating Instance type t2 to t3 I have observed instance Memory Utilization is more than 80%. I have not seen this much memory utilization in t2 instance. Help me understand why t3 consumes more Memory