Have you read this discussion about the Meter Pro? Looks like it was just added to HA within the past month or so, and may require you to delete anything previously discovered, but it appears to work now over bluetooth.
The evaporative humidifier — which is still pretty new — appears to be a WiFi device (bluetooth is only used for setup), similar to SwitchBot’s plugs and bulbs (which are both esp32 inside, incidentally). There’s a 9to5mac article and a YouTube video explaining how to add it HA using Matter but only if you have the SwitchBot Hub 2 (which is SwitchBot’s limitation, not HA’s). Sometimes these things just take time to be fully integrated.
Personally, I flashed all my SwitchBot WiFi plugs and bulbs with Tasmota which integrates with HA fully locally, even with Matter, without the Hub 2. They were the easiest devices I’ve ever flashed thanks to switchbota.