Spen doesn't connect

[Tallman]

In Settings → Advanced features → SPen → Air action

Do you have it turn on?

Also, try Reset SPen and see if it pairs again.

[Georgine]

Hi, if your S Pen won’t connect to your phone or if it doesn’t seem to be charging, resetting the S Pen is a quick fix. To reset it, open Settings, and then search for and select S Pen. Tap S Pen again, then tap S Pen remote or Air actions and then tap More options (the three vertical dots). Tap Reset S Pen and wait for the S Pen to reset itself.

Note: Resetting your S Pen will revert all of its features, including remote commands, to their default settings.