see the last Community news from last week: Sailfish Community News, 24th October 2024 - Shipping. In the text the current SFOS 5 version is called “RC2”, just a candidate:
Sailfish 5.0 release has been on CBeta for two weeks. In practise, there’s a second release candidate (RC2) available and this 5.0.0.21 looks like the first update candidate for the Jolla C2 devices. Rolling out to the early access subscribers would likely happen with third release candidate – let’s see how it goes but this is the current thinking.