I can view the log using the following command.
aws logs get-log-events --log-group-name groupName --log-stream-name streamName --limit 100
wha
To tail CloudWatch Logs effectively I created a tool called cw.
It's super easy to install (it supports brew, snap and scoop), fast (it targets the specific hardware architecture, no intermediate runtime) and it has a set of features that make life easier.
Your example with cw would be:
cw tail -f groupName:streamName