I updated the HDHomeRun software today and when I checked the software interface it didn't list channel 1987. But when I went to the ipaddress/lineup.html?show=all link where it did show the channel but it was crossed out.We’re always looking for ways to keep our network as efficient and reliable as possible. That’s why we’ll be rolling out an update over the next four months.
If you are using a CableCard in your laptop, PC, TV or Tivo you may be impacted.
Here’s what we need you to do:
Tune in to channel 1987
If you can see the program, great news, you’re good to go.
If you can’t see the program, don’t worry you have options:
Check your device’s owner’s manual to see if an update to MPEG4 is supported. If so, just update.
Request a Contour box be shipped to you free. Or just pick one up from your nearest Cox Solutions Store. It’s totally free the first twelve months. After that, it’s just $8.50-10.00/month, depending on which box you choose.
Channel impact schedule
If you don’t update your device or pick up a Contour box, you’ll start losing channels in early October and won’t be able to access any channels as soon as October 26, 2020.
We apologize for any inconvenience this may cause.

And the json version of the link shows channel 1987 (CSPN4) as not subscribed the same as it shows channels like HBO. So I don't know if I'm not able to see the program because of my device not being compatible or it just not being a part of my cable plan.

So most of the channels there show as using mpeg2 but there are some that use H264 which I am able to view in the HDHomeRun app on windows. And I just checked the firmware update log where it says:
So I assume I'll be fine and it's just not subscribing to the channel preventing me from seeing it?Release 20080427:
Speed up lock when auto-detecting modulation.
Detect MPEG4/H.264 video streams.