AWS CLI Create EC2 working perfectly but not visible or available in AWS Console

I'm using the AWS CLI the first time and I just logged in with ma IAM Account that I created wich has all EC2 Permissions. I first tried to create a key-pair for the new Instance wich worked flawless according to console and the return values I received but in the AWS EC2 Console the key is not shown. Not even now, hours after my first attempt. Also other Commands like creating a SecurityGroup did work however they did no change to the AWS EC2 Console in the Web. Even starting the Instance did work according to CLI but there was no instance listed in AWS EC2 Console after executing the command. It's also worth to acknowledge, that all these instances I tried to create actually exist when I try to execute "aws ec2 describe-instances" and they're even running according to console but still don't show up in the Web Console. They're not reachable by SSH using the provided "public IP" that comes with the response.

Command I used to create the KeyPair:

aws ec2 create-key-pair --key-name new-instance-keypair --query 'KeyMaterial' --output text > new-instance-keypair.pem

Command I used to create the Security-Group:

aws ec2 create-security-group \
    --group-name "new-group" \
    --description "Web Securitgy group" \
    --output text

(even go the ID as response there)