Elastic IP is not available for free tier. Elastic IP is a rare service provided by AWS. Public IPV4 addresses are scarce resource. The number of addresses available are in limited, and AWS is committed to helping that space efficiently. By default, every account have a limit of 5 Elastic IP per region. If you need more the 5 Elastic IP addresses, You can apply for more Elastic IP address here. Any increases will be specific to the region they have been requested for.
Hope this helps your query.