The upgrade was successfully completed at around 16:27 UTC, but we're still fighting with some performance issues after the upgrade. Our database and the outbound federation container are currently using significantly higher CPU than expected, which is still being investigated to identify the root cause.
PieFed and Mbin both allow you to block URLs, like of a particular news source that you don't want. At a guess, the Sync and Connect Lemmy apps may do likewise (but I don't truly know). If Lemmy does not do it in the base web UI, you may have to hunt around to get the functionality that you want. I just wanted to let you know that it definitely does exist, maybe not in base Lemmy, but in multiple other ways, in case that helps.