VyOS does not have the possibility to configure PRF in IKEv2 proposals
https://docs.strongswan.org/docs/5.9/config/IKEv2CipherSuites.html#_pseudo_random_functions
https://docs.strongswan.org/docs/5.9/swanctl/swanctlConf.html#_connections
Need to add the possibility to add PRF to IKE group when AEAD is used
set vpn ipsec ike-group IKE-group proposal 1 prf <PRF>