The changelog is as generic as it gets without mentioning any new features, so it appears to be just a routine update. Samsung hasn't detailed the October 2020 security patch either and there's no telling what vulnerabilities have been addressed with this latest release. Security updates usually debut without a changelog for security purposes but Samsung is likely to reveal these details by mid-October. And by that time, we expect the October 2020 security patch to become available to more Galaxy devices, so stay tuned if you own a different phone than the Galaxy A50.
As for Galaxy A50 owners, the October 2020 security update will reach more units as availability expand, so give it a bit more time if it's not available for you yet. The update will be accompanied by a notification but you can try to trigger it manually from Settings. Access Software update and tap Download and install.
