When I configure the ACL-plugin with the provided Postman request, VAT dump shows:
vat#acl_dump
ipv4 action 1 src 0.0.0.0/0 dst 0.0.0.0/0 proto 58 sport 125-130 dport 0-0 tcpflags 0 mask 0
and the classifier does not match icmpv6 packets, as they are all ipv6.
Equivalent configuration in VAT:
vat#acl_add_replace ipv6 action 1 sport 125-130 dport 0 proto 58
does produce the expected result:
vat#acl_dump
ipv6 action 1 src 0.0.0.0/0 dst 0.0.0.0/0 proto 58 sport 125-130 dport 0-0 tcpflags 0 mask 0