Can I activate an Adobe font during the trial version?
Yes. It will remain active as long as your subscription is active. You will not have access to it after your subscription ends.
It says that I was able to activate the font but it is not in my available
a couple of thoughts.
1) If you already had a font of the same name on your computer, a font conflict could cause neither of them to be available
2) When I have had an issue with Adobe fonts, sometimes deactivating and reactivating the problem font fixes it (at least temporarily)
is it not working? did you try activating a font?