Hey there Servalmaracuya,
It does look like this is a supported camera per: iOS - Home Accessories - Apple. However, the capabilities and functionality that are offered can differ by device. You can reach out to Arlo's Support directly and offer feedback for their functionality or you can provide Apple with feedback on what capabilities are allowed with their software and hardware. Product Feedback - Apple.
If you need help with setting up a secure video on your HomeKit, you can follow the steps on this page: Set up HomeKit Secure Video on all your devices - Apple Support. Along with this page on how to Set up security cameras in Home on iPhone - Apple Support.
As it shows there:
When you add a HomeKit Secure Video camera in the Home app, you can choose streaming and recording options and assign the camera to a room.
Which applies only to the functionality that is offered by the hardware itself.
We hope this information helps you out.
Cheers!