Siri is not working on my iPhone

edu ~ Apple's iPhone User Guide says: "If your iPhone isn’t working as expected, you can try restarting it by turning it off, then turning it back on. If turning it off and on doesn’t fix the issue, try forcing it to restart.":

Turn iPhone on or off - Apple Support

õ¿õ¬

There are additional things to try in the link above your post, copied here:

If "Hey Siri" isn't working on your iPhone - Apple Support