This is one of the big reasons I've gravitated towards a reverse-chronological feed that takes you from the past to the present -- at some point you hit a natural end, which is a natural prompt to go do something else. I've picked up Reeder[0] as a feed reader, since it can aggregate a bunch of sources (chiefly RSS, but also Mastodon, BlueSky, reddit, etc) and presents it in such a timeline without pressure to read everything.

[0] https://reederapp.com