My knowledge about accessing Netflix via VPN is limited, so I can't comment any more about that, but, as an experiment, I went through the new titles added to SG within the last 7 days (added since 28th Nov), and noticed that they all had one thing in common: they were all indexed as also available in the U.S. catalog.

Of course there are going to be titles common to both countries, especially ones which Netflix has global licenses for, and while I can't claim to have checked every single one of these newly added titles, it does seem that every title I have tried accessing from UNOGS that is not truly viewable here in Singapore does show up as available in the U.S.

Most telling is The Office (U.S.) series, known for being available only on Netflix US and Canada, is showing up on this site as available for SG (and several other countries), https://unogs.com/title/70136120
Another is Dexter, which I believe is also not available on Netflix outside of U.S., but showing up on UNOGS as available in several countries, https://unogs.com/title/70136126

My theory is, for some reason, the titles recently added to SG (and perhaps even the other countries that seemingly share the above 2 titles I quoted as examples) are actually pulled from the U.S. catalog. Perhaps this may be an issue to do with the VPN provider's servers, but this is just my wild guess as I earlier admitted, I know very little about the workings of VPNs.

Sorry for the wall of text.

https://ifconfig.co/country

To determine the validity of the title, I simply try to access the tiles from the UNOGS page's "watch now" button, and if the title is not available here in SG, it brings up an error page like this, https://imgur.com/Jri1ZdI

As for examples, most of the tiles that show up under the "new videos (last 7 days)" search will bring up that error. A concrete example is "28 Days", https://unogs.com/title/60000880
I am quoting these because they are just sitting there on the front page whenever I access the SG tab for new videos added.

Another example is this, https://unogs.com/title/80116762
This title actually left SG a month or 2 back, but since the refresh on 28th Nov, is now listed on UNOGS as available, when it actually isn't.

Examples of videos that are indeed available but aren't showing up on this site include "MIB International", seen here, https://unogs.com/title/81057361
Incidentally it is expiring in a few days time on the 4th, but don't show up as available for SG, nor on SG's expiring titles tab, although they do for HK and Thailand, which I now rely on as these 3 countries' available titles are very similar.

Thank you for the response. While Thailand recent 7-day new updates seem accurate enough, I believe there is something wrong with Singapore's. Although a thousand over titles has been re-indexed on 28th Nov, there are many, many, titles showing up on UNOGS but don't really exist for the Singapore catalogue, while titles that are in actual fact there are not showing up on UNOGS. It is completely inaccurate.

Hopefully this can be resolved soon.