I use NewRelic myself. They are software agnostic and only connect to your URL to get the expiration date.

If you set up LE correctly, it should never get an alert. I haven’t been alerted since I set it up, to the point that I wonder if I set up the monitor correctly.

The only thing I wish it could do is use custom ports. I have some services running on non standard ports.

As much as I want to use F-Droid, my work blocks all third party app stores so it’s either have access to my work stuff on one phone (via profiles) or dual wield two phones.

I lack the patience to dual wield again. It’s very annoying.