Wanted to provide an update regarding this issue to share awareness for those who are running into the similar issue I was experiencing.
I stumbled upon this forum, https://forum.proxmox.com/threads/not-showing-correct-ram-for-vm.70219/ and I confirmed inside of the Proxmox VM configuration, I had HotPlug enabled for both Memory and CPU.
As soon as I removed this from the VM Option and reboot, it resolved my issue and now I can see the correct Memory Allocation in the PFSense Dashboard.
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