You can use hn.algolia.com, sort it by date, and then search for the usernames that you want to follow like this, "author:username1 author:un2 .. .. .." there

You can use hn.algolia.com, sort it by date, and then search for the usernames that you want to follow like this, "author:username1 author:un2 .. .. .." there is a limit on how many users you can search this way, I have split my list of users into 2 lines, and have those 2 lines pinned in my clipboard history.