A BIG THANK YOU to Guillaume.
Thanks to Guillaume who was able to advise me in my search for a POE+ switch with my various technical criteria: 24-port managed and rackable switch (level 2), I needed 21 RJ45 ports, GBIC ports mandatory, 3 POE WiFi terminals and 4 POE cameras. I finally ordered this switch with an Aruba Instant On AP25 Wi-Fi 6 (R9B28A) for the time being, its support (R9B36A) and the TEXTORM SFP+ 10G BASE-T module for HP/A switchRUBA.
Before integrating everything into a patchbay, I did an 'on-the-fly' installation and everything works. The settings via the switch's web interface (in French) are simple and very intuitive, and the switch is very quiet. Aruba Network is a subsidiary of Hewlett-Packard.