Hello,
Yes, this is correct and it is stated in the configuration guide
https://support.hpe.com/hpesc/public/docDisplay?docId=emr_na-c04622710
page 5-5 (pdf 53)
Port VLAN ID
The VLAN ID that this port will assign to untagged or priority-tagged frames received on this port. This value is also known as the Port VLAN ID (PVID). The PVID is set to the ID of the VLAN of which the port is an untagged member. The PVID is not configurable. In a tagged frame, the VLAN is identified by the VLAN ID in the tag. By default, the PVID is 1 for all ports, which is the VLAN ID of the default VLAN, VLAN 1
In the menu VLAN > Port Membership you can configre the VLAN memberships of the port. The untagged membership in a VLAN will also define the PVID. That means the VLAN you define as untagged here should appear in VLAN > Port configuration as PVID.