VPGeek lists both Known Neurons and what they call Public neurons. The Public neurons are mostly current or past voting members for Synapse and CodeGov. There are 42 Known Neurons that exist, which means there are 31 neurons that VPGeek is calling Public neurons. However, the private/public feature for neurons has been now been implemented and all neurons that are not Known Neurons are now private neurons by default. That means VPGeek cannot see how any of the formerly Public neurons voted. Hence, it looks like they didn’t vote until either VPGeek changes which neurons are listed or the neuron owners switch their neuron configuration from private to public (which just became available in the NNS dApp today).
If you go to the dashboard and look at a proposal, it will show only Known Neurons. The vast majority of them voted on the proposals that you provided as examples above.