The latest log backup is older than expected

Is there a way to change this check’s thresholds so that it doesn’t show critical all the time? I take nightly backups and log backups and on my high load DBs I take log backups every 3 hours. This check is set for every 10 minutes to 60 minutes

Yes, just change the thresholds in the check_config table.

As a side note, even if your RPO is more than 3 hours, you probably should be taking your log backups more often. Why would you want to take them every 10 minutes?

The default parameters for that check are set to Warning if greater than 10 and critical if greater than 60

Yep. In line with what I’m suggesting but feel free tk adjust to your liking.