When reviewing the VCF Business Services Console (https://vcf.broadcom.com) for a site ID that has Omnissa Horizon on VVF for VDI associated with it, no 9.x licencing is available.
VCF 9.x
At the time of writing, Broadcom has not yet announced timelines for vSphere 9 support with VVF for VDI.
Please refer to this Omnissa article for current information -
https://kb.omnissa.com/s/article/6000381
For a version 9.x upgrade - only VVF and VCF are eligible, VVF for VDI is not entitled currently.