Cannot iterate over null

jq: error (at <stdin>:1904): Cannot iterate over null (null)

aws ec2 describe-instances --query 'Reservations[*].Instances[?not_null(PublicIpAddress)]' | jq -r '.[][]|.PublicIpAddress+" "+(.Tags[]|select(.Key=="Name").Value)'

Remove Tags filter to avoid list of IPs to be truncated and get full list:
aws ec2 describe-instances --query 'Reservations[*].Instances[?not_null(PublicIpAddress)]' | jq -r '.[][].PublicIpAddress'

See also

• jq, JSON, jq -r, jq -c, jid