Hi. We (Project-GC, which I represent) is using OpenStreetMap as a source for such data. So you are completely correct that far, updated OSM data is required. We do not however automatically update the data in Project-GC on a regular basis.
If a country has changed their administrative borders, or, OSM has been quite wrong and has been corrected, we will update our data if someone informs us. As you can imagine it's hard for us to manually keep track of the 250 (geocaching-)countries that exists, we just don't have local knowledge enough.
Best way to inform us is to create a support ticket via the orange Support-buttons on the web. But your query has been found by one of us and you can definitely consider us notified. We will look into updating our data.
Our sister-site OSM-Boundaries.com is currently importing the last OSM-dump of 2021 and after that it will import the first dump of 2022 (not yet downloadable). We will plan for update the region and county data of Latvia once the first 2022-dump is imported. With that import we are also planning to update USA. Expect it to be updated in ~2 weeks time. If you can't see that the data has been corrected before February, please feel free to ask us if we missed it, or something didn't work out as it should. Either by replying here, or by contacting our support directly (if so, please provide a link to this thread).