CloudWatch Log group missing although CloudWatch agent is working - amazon-web-services

Question

I can't see the Log group defined by Cloud Watch agent on my EC2 instance
Also, the default log group /var/log/messages is not visible.
I can't see these logs also on root account.
I have other log groups configured and visible.
I have the following setup:
Amazon Linux
AMI managed role attached to instance: CloudWatchAgentServerPolicy
Agent installed via awslogs - https://docs.aws.amazon.com/AmazonCloudWatch/latest/logs/QuickStartEC2Instance.html
Agent started successfully
No errors in /var/log/awslogs.log. Looks like working normally. Log below.
Configuration done via /etc/awslogs/config/FlaskAppAccessLogs.conf
Instance has outbound access to internet
Instance security groups allows all outbound traffic
Any ideas what to check or what can be missing?
/etc/awslogs/config/FlaskAppAccessLogs.conf:
cat /etc/awslogs/config/FlaskAppAccessLogs.conf
[/var/log/nginx/access.log]
initial_position = start_of_file
file = /var/log/nginx/access.log
datetime_format = %d/%b/%Y:%H:%M:%S %z
buffer_duration = 5000
log_group_name = FlaskApp-Frontends-access-log
log_stream_name = {instance_id}
/var/log/awslogs.log
2019-01-05 17:50:21,520 - cwlogs.push - INFO - 24838 - MainThread - Loading additional configs from /etc/awslogs/config/FlaskAppAccessLogs.conf
2019-01-05 17:50:21,520 - cwlogs.push - INFO - 24838 - MainThread - Missing or invalid value for use_gzip_http_content_encoding config. Defaulting to use gzip encoding.
2019-01-05 17:50:21,520 - cwlogs.push - INFO - 24838 - MainThread - Missing or invalid value for queue_size config. Defaulting to use 10
2019-01-05 17:50:21,520 - cwlogs.push - INFO - 24838 - MainThread - Using default logging configuration.
2019-01-05 17:50:21,544 - cwlogs.push.stream - INFO - 24838 - Thread-1 - Starting publisher for [c17fae93047ac481a4c95b578dd52f94, /var/log/messages]
2019-01-05 17:50:21,550 - cwlogs.push.stream - INFO - 24838 - Thread-1 - Starting reader for [c17fae93047ac481a4c95b578dd52f94, /var/log/messages]
2019-01-05 17:50:21,551 - cwlogs.push.reader - INFO - 24838 - Thread-4 - Start reading file from 0.
2019-01-05 17:50:21,563 - cwlogs.push.stream - INFO - 24838 - Thread-1 - Starting publisher for [8ff79b6440ef7223cc4a59f18e5f3aef, /var/log/nginx/access.log]
2019-01-05 17:50:21,587 - cwlogs.push.stream - INFO - 24838 - Thread-1 - Starting reader for [8ff79b6440ef7223cc4a59f18e5f3aef, /var/log/nginx/access.log]
2019-01-05 17:50:21,588 - cwlogs.push.reader - INFO - 24838 - Thread-6 - Start reading file from 0.
2019-01-05 17:50:27,838 - cwlogs.push.publisher - WARNING - 24838 - Thread-5 - Caught exception: An error occurred (ResourceNotFoundException) when calling the PutLogEvents operation: The specified log group does not exist.
2019-01-05 17:50:27,839 - cwlogs.push.batch - INFO - 24838 - Thread-5 - Creating log group FlaskApp-Frontends-access-log.
2019-01-05 17:50:27,851 - cwlogs.push.publisher - WARNING - 24838 - Thread-3 - Caught exception: An error occurred (ResourceNotFoundException) when calling the PutLogEvents operation: The specified log group does not exist.
2019-01-05 17:50:27,851 - cwlogs.push.batch - INFO - 24838 - Thread-3 - Creating log group /var/log/messages.
2019-01-05 17:50:27,966 - cwlogs.push.batch - INFO - 24838 - Thread-5 - Creating log stream i-0d7e533f67870ff8d.
2019-01-05 17:50:27,980 - cwlogs.push.batch - INFO - 24838 - Thread-3 - Creating log stream i-0d7e533f67870ff8d.
2019-01-05 17:50:28,077 - cwlogs.push.publisher - INFO - 24838 - Thread-5 - Log group: FlaskApp-Frontends-access-log, log stream: i-0d7e533f67870ff8d, queue size: 0, Publish batch: {'skipped_events_count': 0, 'first_event': {'timestamp': 1546688052000, 'start_position': 0L, 'end_position': 161L}, 'fallback_events_count': 0, 'last_event': {'timestamp': 1546708885000, 'start_position': 4276L, 'end_position': 4468L}, 'source_id': '8ff79b6440ef7223cc4a59f18e5f3aef', 'num_of_events': 24, 'batch_size_in_bytes': 5068}
Status of awslogs
sudo service awslogs status
awslogs (pid 25229) is running...
IAM role policy:
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": [
"cloudwatch:PutMetricData",
"ec2:DescribeTags",
"logs:PutLogEvents",
"logs:DescribeLogStreams",
"logs:DescribeLogGroups",
"logs:CreateLogStream",
"logs:CreateLogGroup"
],
"Resource": "*"
},
{
"Effect": "Allow",
"Action": [
"ssm:GetParameter"
],
"Resource": "arn:aws:ssm:*:*:parameter/AmazonCloudWatch-*"
}
]
}

Answer 1

It's seems that posting a question may quickly help to find an answer.
There is additional configuration in which i have made typo:
sudo cat /etc/awslogs/awscli.conf
[plugins]
cwlogs = cwlogs
[default]
region = us-west-1
As described above the logs are delivered to us-west-1 region.
I was checking us-west-2 :)