“InfluxDB add-on won’t appear in my App Store search or when browsing the Community Add-ons repository, even after a Supervisor store reload, full HA restart, and removing/re-adding the repository. Running HA Green, [your HA version, found in Settings → System]. Any ideas?”
It was removed from the store a couple of weeks ago. Read here
I switched from InfluxDB to InfluxDB3. To find it add this repository URL