Appendix B.22 of the AIX Logical Volume Manager from A to Z: Troubleshooting and Commands from the year 2000 describes the following:
lqueryvg - An object file command that queries the attributes of a volume group.
Usage: lqueryvg [-g VGID] [-p PVname] [-N] [-s] [-F] [-n] [-c] [-D] [-a] [-l] [-P] [-A] [-v] [-t]
-g VGID The VGID of the volume group to query.
-p PVname The name of the physical volume that contains the VGID.
-N Returns the maximum number of logical volumes allowed in the volume group.
-s Returns the physical partition size.
-F Returns the number of free physical partitions in the volume group.
-n Returns the current number of logical volumes in the volume group.
-c Returns the current number of physical volumes in the volume group.
-D Returns the total number of VGDAs for the volume group.
-a Returns all the static attributes for the volume group ( ).
-l Returns each LVID, logical volume name and state for each logical volume in the volume group.
-P Returns each PVID, number of VGDAs and state for each physical volume in the volume group.
-A Returns all attributes for the volume group (static attributes, logical volume details and physical volume details).
-v Used only with the -p PVName flag to return the VGID from that physical volume.
-t Includes the tags with the output for the above options.
There's also a note near the end of section 2.6.7 saying:
Essentially, the low-level commands prefixed with l simply act as parsers
and front-ends onto the LVM API calls. To gain a good understanding of
these commands’ capabilities, one may look up the relevant API call, for
example, lvm_queryvgs for lqueryvgs. These calls are listed in the AIX
Version 4.3 Technical Reference: Kernel and Subsystems Technical
Reference, Volume 1, SC23-4163. Recall, however, that BigVG
functionality will not be documented by IBM.
which could land you at the IBM® Knowledge Center for the lvm_queryvg Subroutine.