I was searching for AMI's with pfsense but seems like they are all vanished somehow.
How can I install pfsense
on a FreeBSD ec2 instance besides creating a local image and then converting into raw than AMI?
Pfsense is it's own customised OS. You can't 'install' pfsense on an existing FreeBSD system as there is nothing released to allow you to do this.
This pfsense Digest post also lists the currently available official AMIs
The certified instance is
It’s AMI ID id ami-6821b858
The public instances are
US East (N. Virginia) - ami-11a58278
US West (Oregon) - ami-3430ab04
US West (N. California) - ami-0c417049
EU (Ireland) - ami-9c1541ce
Asia Pacific (Singapore) - ami-9c1541ce
Asia Pacific (Tokyo) - ami-1f0e681e
Asia Pacific (Sydney) - ami-6fdf4055
South America (Brasil) - ami-cb13b5d6
Honestly, it took me 30 seconds to find this - you should really learn to use a search engine, they are the way forward.